22
Cardinal	twenty-two
Ordinal	twenty-second
Factorization
Roman numeral	XXII
Binary	10110
Hexadecimal	16

Twenty-two is a composite number, its proper divisors being 1, 2 and 11.

Twenty-two is:

• The atomic number of titanium.
• The number of letters in the Hebrew alphabet.
• In the Kabbala, the number of paths between the sephiroth.
• The number of yards in a chain. A cricket pitch is 22 yards in length.
• The narrowest f-stop available in most single-lens reflex cameras.
• The number of cards in the Major Arcana of a tarot deck, if you include the fool.
• The number of players in a rugby union squad for international and other top-level matches. Seven of the players are "on the bench", ready to play as replacements or substitutes.
• The year AD 22.