21356364696 has 16 divisors (see below), whose sum is σ = 53390911800. Its totient is φ = 7118788224.

The previous prime is 21356364691. The next prime is 21356364703. The reversal of 21356364696 is 69646365312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21356364691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444924241 + ... + 444924288.

Almost surely, 2^21356364696 is an apocalyptic number.

It is an amenable number.

21356364696 is an abundant number, since it is smaller than the sum of its proper divisors (32034547104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21356364696 is a wasteful number, since it uses less digits than its factorization.

21356364696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889848538 (or 889848534 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 51.

The spelling of 21356364696 in words is "twenty-one billion, three hundred fifty-six million, three hundred sixty-four thousand, six hundred ninety-six".