20724666432 has 28 divisors (see below), whose sum is σ = 54834013776. Its totient is φ = 6908222080.

The previous prime is 20724666427. The next prime is 20724666451. The reversal of 20724666432 is 23466642702.

It is a super-2 number, since 2×20724666432² (a number of 21 digits) contains 22 as substring.

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, 53970294 + ... + 53970677.

Almost surely, 2^20724666432 is an apocalyptic number.

It is an amenable number.

20724666432 is an abundant number, since it is smaller than the sum of its proper divisors (34109347344).

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

20724666432 is a wasteful number, since it uses less digits than its factorization.

20724666432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107940986 (or 107940976 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 42.

The spelling of 20724666432 in words is "twenty billion, seven hundred twenty-four million, six hundred sixty-six thousand, four hundred thirty-two".