22 (number)

This article is about the number. For other uses, see 22 (disambiguation).
21 22 23
Cardinal twenty-two
Ordinal 22nd
(twenty-second)
Factorization 2 × 11
Divisors 1, 2, 11, 22
Roman numeral XXII
Binary 101102
Ternary 2113
Quaternary 1124
Quinary 425
Senary 346
Octal 268
Duodecimal 1A12
Hexadecimal 1616
Vigesimal 1220
Base 36 M36

22 (twenty-two) is the natural number following 21 and preceding 23. In a 24-hour clock, the twentysecond hour is in conventional language called ten or ten o'clock.

In mathematics

22 is deficient

When cutting a circle with just six line segments, the maximum number of pieces that can be so created is 22,[3] thus 22 is a central polygonal number (see lazy caterer's sequence).[4]

In physics and chemistry

In aircraft

In art, entertainment, and media

In music

In other fields

In computing and technology

In religion

In sports

In American football

In Australian rules football

In cricket

In jerseys

In motorsports

In rugby union

In soccer

In weights and measures

In other uses

Twenty-two may also refer to:

See also

References

  1. "Sloane's A000326 : Pentagonal numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-31.
  2. "Sloane's A069099 : Centered heptagonal numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-31.
  3. Wells, D. The Penguin Dictionary of Curious and Interesting Numbers London: Penguin Group. (1986): 31
  4. "Sloane's A000124 : Central polygonal numbers (the Lazy Caterer's sequence)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-31.
  5. "Sloane's A002088 : Sum of totient function". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-31.
  6. "Sloane's A001608 : Perrin sequence". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-31.
  7. "Sloane's A059756 : Erdős-Woods numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-31.
  8. "Sloane's A006753 : Smith numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-31.

External links

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