21252563160 has 32 divisors (see below), whose sum is σ = 63757689840. Its totient is φ = 5667350144.

The previous prime is 21252563153. The next prime is 21252563179. The reversal of 21252563160 is 6136525212.

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, 88552227 + ... + 88552466.

Almost surely, 2^21252563160 is an apocalyptic number.

21252563160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21252563160 is an abundant number, since it is smaller than the sum of its proper divisors (42505126680).

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

21252563160 is a wasteful number, since it uses less digits than its factorization.

21252563160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177104707 (or 177104703 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 21252563160 in words is "twenty-one billion, two hundred fifty-two million, five hundred sixty-three thousand, one hundred sixty".