21736313912137 has 16 divisors (see below), whose sum is σ = 24346791080640. Its totient is φ = 19233804326400.

The previous prime is 21736313912111. The next prime is 21736313912149. The reversal of 21736313912137 is 73121931363712.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21736313912137 - 2²⁷ = 21736179694409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21736313912107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55458087 + ... + 55848652.

It is an arithmetic number, because the mean of its divisors is an integer number (1521674442540).

Almost surely, 2^{21736313912137} is an apocalyptic number.

It is an amenable number.

21736313912137 is a deficient number, since it is larger than the sum of its proper divisors (2610477168503).

21736313912137 is a wasteful number, since it uses less digits than its factorization.

21736313912137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111307224.

The product of its digits is 857304, while the sum is 49.

The spelling of 21736313912137 in words is "twenty-one trillion, seven hundred thirty-six billion, three hundred thirteen million, nine hundred twelve thousand, one hundred thirty-seven".