21372760512 has 84 divisors (see below), whose sum is σ = 62916928776. Its totient is φ = 6931699200.

The previous prime is 21372760501. The next prime is 21372760529. The reversal of 21372760512 is 21506727312.

21372760512 is a `hidden beast` number, since 2 + 1 + 3 + 72 + 76 + 0 + 512 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 480114 + ... + 522737.

Almost surely, 2^21372760512 is an apocalyptic number.

It is an amenable number.

21372760512 is an abundant number, since it is smaller than the sum of its proper divisors (41544168264).

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

21372760512 is a wasteful number, since it uses less digits than its factorization.

21372760512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002906 (or 1002893 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The spelling of 21372760512 in words is "twenty-one billion, three hundred seventy-two million, seven hundred sixty thousand, five hundred twelve".