23187939564 has 12 divisors (see below), whose sum is σ = 54105192344. Its totient is φ = 7729313184.

The previous prime is 23187939517. The next prime is 23187939613. The reversal of 23187939564 is 46593978132.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 966164137 + ... + 966164160.

Almost surely, 2^23187939564 is an apocalyptic number.

It is an amenable number.

23187939564 is an abundant number, since it is smaller than the sum of its proper divisors (30917252780).

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

23187939564 is a wasteful number, since it uses less digits than its factorization.

23187939564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932328304 (or 1932328302 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 57.

The spelling of 23187939564 in words is "twenty-three billion, one hundred eighty-seven million, nine hundred thirty-nine thousand, five hundred sixty-four".