14 (fourteen) is a natural number following 13 and preceding 15. In relation to the word "four" ( 4), 14 is spelled "fourteen".

In mathematics

* 14 is a composite number. * 14 is a

square pyramidal number In mathematics, a pyramid number, or square pyramidal number, is a natural number that counts the number of stacked spheres in a pyramid with a square base. The study of these numbers goes back to Archimedes and Fibonacci. They are part of a broa ...

. * 14 is a stella octangula number. * In

hexadecimal In mathematics and computing, the hexadecimal (also base-16 or simply hex) numeral system is a positional numeral system that represents numbers using a radix (base) of 16. Unlike the decimal system representing numbers using 10 symbols, hexa ...

, fourteen is represented as E * Fourteen is the lowest even ''n'' for which the equation φ(''x'') = ''n'' has no solution, making it the first even nontotient (see

Euler's totient function In number theory, Euler's totient function counts the positive integers up to a given integer that are relatively prime to . It is written using the Greek letter phi as \varphi(n) or \phi(n), and may also be called Euler's phi function. In ot ...

). * Take a set of real numbers and apply the closure and complement operations to it in any possible sequence. At most 14 distinct sets can be generated in this way. ** This holds even if the reals are replaced by a more general topological space. See

Kuratowski's closure-complement problem In point-set topology, Kuratowski's closure-complement problem asks for the largest number of distinct sets obtainable by repeatedly applying the set operations of closure and complement to a given starting subset of a topological space. The answ ...

* 14 is a Catalan number. * Fourteen is a Companion Pell number. * According to the Shapiro inequality 14 is the least number ''n'' such that there exist ''x'', ''x'', ..., ''x'' such that :

\sum_^ \frac < \frac

where ''x'' = ''x'', ''x'' = ''x''. * There are fourteen possible

Bravais lattices In geometry and crystallography, a Bravais lattice, named after , is an infinite array of discrete points generated by a set of Translation operator (quantum mechanics)#Discrete Translational Symmetry, discrete translation operations described in t ...

that fill three-dimensional space.

In science

Chemistry

*The atomic number of silicon *The approximate atomic weight of nitrogen *The maximum number of electrons that can fit in an f sublevel * Group 14 elements in the periodic table.

Astronomy

* Messier object M14, a magnitude 9.5 globular cluster in the constellation Ophiuchus *The

New General Catalogue The ''New General Catalogue of Nebulae and Clusters of Stars'' (abbreviated NGC) is an astronomical catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888. The NGC contains 7,840 objects, including galaxies, star clusters and ...

object

NGC 14 NGC 14 is an irregular galaxy in the Pegasus constellation. It was included in Halton Arp's Atlas of Peculiar Galaxies, under the section "Galaxies with the appearance of fission," since the irregular appearance of this galaxy causes it to look ...

, a magnitude 12.5 irregular galaxy in the

constellation A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object. The origins of the e ...

Pegasus Pegasus ( grc-gre, Πήγασος, Pḗgasos; la, Pegasus, Pegasos) is one of the best known creatures in Greek mythology. He is a winged divine stallion usually depicted as pure white in color. He was sired by Poseidon, in his role as hor ...

In religion and mythology

Christianity

*According to the Gospel of Matthew "there were fourteen generations in all from Abraham to David, fourteen generations from David to the exile to Babylon, and fourteen from the exile to the Messiah". ( Matthew 1, 17) *The number of

Stations of the Cross The Stations of the Cross or the Way of the Cross, also known as the Way of Sorrows or the Via Crucis, refers to a series of images depicting Jesus Christ on the day of Crucifixion of Jesus, his crucifixion and accompanying prayers. The station ...

observed by some Christian denominations. *The Fourteen Holy Helpers were a group of

saint In religious belief, a saint is a person who is recognized as having an exceptional degree of Q-D-Š, holiness, likeness, or closeness to God. However, the use of the term ''saint'' depends on the context and Christian denomination, denominat ...

s formerly venerated together by Roman Catholics.

Islam

*The number of

Muqattaʿat The mysterious letters (''muqaṭṭaʿāt'', ar, حُرُوف مُقَطَّعَات ''ḥurūf muqaṭṭaʿāt'', "disjoined letters" or "disconnected letters") are combinations of between one and five Arabic letters figuring at the begin ...

in the Quran. *Significant for

Twelver Shia Muslims Twelver Shīʿīsm ( ar, ٱثْنَا عَشَرِيَّة; '), also known as Imāmīyyah ( ar, إِمَامِيَّة), is the largest branch of Shia Islam, Shīʿa Islam, comprising about 85 percent of all Shīʿa Muslims. The term ''Twelver ...

who follow the Fourteen Infallibles.

Hinduism

* The number of years of Rama's exile in the forest with Sita and Lakshman.

Mythology

The number of pieces the body of Osiris was torn into by his fratricidal brother Set. The number of sacrificial victims of the Minotaur.

Age 14

*14 is the earliest age that the emancipation of minors can occur in the U.S. *Minimum age a person can purchase, rent, or buy tickets to a 14A rated movie in Canada without an adult. Ratings are provincial, so ratings may vary. A movie can be 14A in one or some provinces and PG in other provinces. A movie can also be rated 14A in one or some provinces and 18A in other provinces. Quebec has a different rating system for films. * Youngest age in Canada a person can watch a 14+ rated show without consent from a legal guardian. *The U.S. TV Parental Guidelines has a rating called "TV-14" which strongly recommends parental guidance for children under the age of fourteen watching the program. *Minimum age at which one can view, rent, purchase, or buy tickets to an 18A rated movie with an accompanying adult in the Canadian provinces of the Maritimes and Manitoba. *Minimum age at which one can work in many U.S. states. Parental consent may be required, depending on the state. * Minimum age at which one can drive a vehicle in the U.S. with a driver's license (with the supervision of an adult over 18 years of age, and with a valid, unmarked driver's license, and at least 365 days of experience driving an actual automobile) *The minimum age limit to drive a 50cc motorbike in Italy. *The most common

age of criminal responsibility The age of criminal responsibility is the age below which a child is deemed incapable of having committed a criminal offence. In legal terms, it is referred to as a defence/defense of infancy, which is a form of defense known as an excuse so tha ...

in Europe. *In some countries, it is the

age of sexual consent Age or AGE may refer to: Time and its effects * Age, the amount of time someone or something has been alive or has existed ** East Asian age reckoning, an Asian system of marking age starting at 1 * Ageing or aging, the process of becoming older * ...

In sports

* In American football, the National Football League playoffs have involved 14 teams since the 2020 season. * In golf, a player can have no more than 14 clubs in the bag. * In rugby union, the starting right wing wears the 14 shirt

In other fields

Fourteen is: *The number of days in a fortnight. *The

Fourteenth Amendment to the United States Constitution The Fourteenth Amendment (Amendment XIV) to the United States Constitution was adopted on July 9, 1868, as one of the Reconstruction Amendments. Often considered as one of the most consequential amendments, it addresses citizenship rights and ...

gave citizenship to those of African descent, in a post- Civil War ( Reconstruction) measure aimed at restoring the rights of slaves. *In traditional British units of weight, the number of pounds in a stone. *The number of points outlined by President Woodrow Wilson for reconstructing a new Europe following World War I, see Fourteen Points. *The number of '' Enigma Variations'' composed by

Edward Elgar Sir Edward William Elgar, 1st Baronet, (; 2 June 1857 – 23 February 1934) was an English composer, many of whose works have entered the British and international classical concert repertoire. Among his best-known compositions are orchestr ...

. *The number of favored rows in the Roman theater for members of the equestrian order according to the '' lex Roscia theatralis'' issued in 67 BC. *The section that one goes to when one dies in the GrailQuest books. *The number of legs on a woodlouse, as well as on '' Hallucigenia''. *A common designation for the thirteenth floor in many buildings for

superstitious A superstition is any belief or practice considered by non-practitioners to be irrational or supernatural, attributed to fate or magic, perceived supernatural influence, or fear of that which is unknown. It is commonly applied to beliefs and pr ...

reasons. *There are 14

British Overseas Territories The British Overseas Territories (BOTs), also known as the United Kingdom Overseas Territories (UKOTs), are fourteen dependent territory, territories with a constitutional and historical link with the United Kingdom. They are the last remna ...

of the United Kingdom. *The number of lines in a

sonnet A sonnet is a poetic form that originated in the poetry composed at the Court of the Holy Roman Emperor Frederick II in the Sicilian city of Palermo. The 13th-century poet and notary Giacomo da Lentini is credited with the sonnet's invention, ...

. * The Number 14 airship by Alberto Santos Dumont was used to test the aerodynamics of his

14-bis The ''14-bis'' (french: Quatorze-bis), (), also known as ("bird of prey" in French), was a pioneer era, canard-style biplane designed and built by Brazilian aviation pioneer Alberto Santos-Dumont. In 1906, near Paris, the ''14-bis'' made a m ...

airplane. * The number of the French department Calvados. * XIV is a storage server manufactured by IBM. It goes by name of "XIV" and is pronounced as the separate letters "X", "I", "V". * The Piano Sonata No. 14, also known as ''Moonlight Sonata'', is one of the most famous piano sonatas composed by Ludwig van Beethoven. * A symbol of infinity in "

The House of Asterion "The House of Asterion" (original Spanish title: "") is a short story by Argentine writer Jorge Luis Borges. The story was first published in 1947 in the literary magazine ''Los Anales de Buenos Aires'' and republished in Borges's short story c ...

" (" es, La casa de Asterión", 1947) by Jorge Luis Borges,Jean Ann Bowman, ''Jorge Luis Borges: A study of criticism in the United States'', M.A. thesis submitted to and approved by the Graduate Faculty of Texas Tech University, May 1987. itself a reference to the 14 sacrificial victims of the Minotaur. * The

Fourteen Words Fourteen Words (also abbreviated 14 or 14/ 88) is a reference to two slogans originated by David Eden Lane, one of nine founding members of the defunct white separatist insurrectionary terrorist organization The Order. The slogans have served ...

are a phrase used by white supremacists. * Nuestra Familia is a gang that uses "XIV" as their symbol because the 14th letter of the Spanish alphabet is "N". * The room number on the top floor of the hospital where

Oliver Hardy Oliver Norvell Hardy (born Norvell Hardy; January 18, 1892 – August 7, 1957) was an American comic actor and one half of Laurel and Hardy, the double act that began in the era of silent films and lasted from 1926 to 1957. He appeared with his c ...

is visited by

Stan Laurel Stan Laurel (born Arthur Stanley Jefferson; 16 June 1890 – 23 February 1965) was an English comic actor, writer, and film director who was one half of the comedy double act, duo Laurel and Hardy. He appeared with his comedy partner Oliver Ha ...

in the movie '' County Hospital'' (1932). *In the epic fantasy series ''

A Song of Ice and Fire ''A Song of Ice and Fire'' is a series of epic fantasy novels by the American novelist and screenwriter George R. R. Martin. He began the first volume of the series, ''A Game of Thrones'', in 1991, and it was published in 1996. Martin, who init ...

'', the Fourteen Flames are a chain of volcanoes that stretch across the Valyrian peninsula. * There are 14 books in the main sequence of the epic fantasy series '' The Wheel of Time'' by Robert Jordan. * The number of years Edmond Dantes spent imprisoned in the Chateau d'If in

Alexandre Dumas Alexandre Dumas (, ; ; born Dumas Davy de la Pailleterie (), 24 July 1802 – 5 December 1870), also known as Alexandre Dumas père (where '' '' is French for 'father', to distinguish him from his son Alexandre Dumas fils), was a French writer ...

' ''

The Count of Monte Cristo ''The Count of Monte Cristo'' (french: Le Comte de Monte-Cristo) is an adventure novel written by French author Alexandre Dumas (''père'') completed in 1844. It is one of the author's more popular works, along with ''The Three Musketeers''. Li ...

''. * Unlike most other mammal species which commonly have 20 digits (''toes''), 14 is the number of digits of the guinea pig or domestic guinea pig (''Cavia porcellus''), also known as the cavy or domestic cavy ().

References

{{Integers, zero Integers