21631732077357 has 48 divisors (see below), whose sum is σ = 32458729139200. Its totient is φ = 13867455571200.

The previous prime is 21631732077331. The next prime is 21631732077379. The reversal of 21631732077357 is 75377023713612.

21631732077357 is a `hidden beast` number, since 2 + 1 + 6 + 317 + 3 + 207 + 73 + 57 = 666.

It is not a de Polignac number, because 21631732077357 - 2²⁷ = 21631597859629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21631732077317) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41772057 + ... + 42286737.

Almost surely, 2^{21631732077357} is an apocalyptic number.

It is an amenable number.

21631732077357 is a deficient number, since it is larger than the sum of its proper divisors (10826997061843).

21631732077357 is a wasteful number, since it uses less digits than its factorization.

21631732077357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515674 (or 515671 counting only the distinct ones).

The product of its (nonzero) digits is 7779240, while the sum is 54.

The spelling of 21631732077357 in words is "twenty-one trillion, six hundred thirty-one billion, seven hundred thirty-two million, seventy-seven thousand, three hundred fifty-seven".