21165304152 has 32 divisors (see below), whose sum is σ = 52979698800. Its totient is φ = 7046242944.

The previous prime is 21165304141. The next prime is 21165304177. The reversal of 21165304152 is 25140356112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 534127 + ... + 572382.

Almost surely, 2^21165304152 is an apocalyptic number.

It is an amenable number.

21165304152 is an abundant number, since it is smaller than the sum of its proper divisors (31814394648).

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

21165304152 is a wasteful number, since it uses less digits than its factorization.

21165304152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107315 (or 1107311 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 21165304152 in words is "twenty-one billion, one hundred sixty-five million, three hundred four thousand, one hundred fifty-two".