21160456137 has 24 divisors (see below), whose sum is σ = 31227880320. Its totient is φ = 13801313760.

The previous prime is 21160456111. The next prime is 21160456139. The reversal of 21160456137 is 73165406112.

21160456137 is a `hidden beast` number, since 2 + 1 + 1 + 60 + 4 + 561 + 37 = 666.

It is not a de Polignac number, because 21160456137 - 2²⁶ = 21093347273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21160456139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1234687 + ... + 1251707.

It is an arithmetic number, because the mean of its divisors is an integer number (1301161680).

Almost surely, 2^21160456137 is an apocalyptic number.

It is an amenable number.

21160456137 is a deficient number, since it is larger than the sum of its proper divisors (10067424183).

21160456137 is a wasteful number, since it uses less digits than its factorization.

21160456137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20013 (or 20010 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 21160456137 in words is "twenty-one billion, one hundred sixty million, four hundred fifty-six thousand, one hundred thirty-seven".