Thirty-six

For the year A.D. 36, see 36.

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Thirty-six (36, XXXVI) is the natural number following thirty-five and preceeding thirty-seven. It is the square of 6 as well as a triangular number. Its divisors are 1, 2, 3, 4, 6, 9, 12, 18 and 36, making it a highly composite number; its factorisation is

This number is the sum of a twin prime (17 + 19).

Thirty-six is also:

• The atomic number of krypton.
• On the piano, the total amount of black keys (for notes not on the C major scale).
• The code for direct dial international phone calls to Hungary.

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List of numbers

Thirty-four - Thirty-five - Thirty-six - Thirty-seven - Thirty-eight

Integer