20971133624 has 32 divisors (see below), whose sum is σ = 46034200800. Its totient is φ = 8768417280.

The previous prime is 20971133597. The next prime is 20971133627. The reversal of 20971133624 is 42633117902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20971133627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4564589 + ... + 4569180.

It is an arithmetic number, because the mean of its divisors is an integer number (1438568775).

Almost surely, 2^20971133624 is an apocalyptic number.

It is an amenable number.

20971133624 is an abundant number, since it is smaller than the sum of its proper divisors (25063067176).

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

20971133624 is a wasteful number, since it uses less digits than its factorization.

20971133624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9133823 (or 9133819 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The spelling of 20971133624 in words is "twenty billion, nine hundred seventy-one million, one hundred thirty-three thousand, six hundred twenty-four".