20957537484 has 96 divisors (see below), whose sum is σ = 60095528640. Its totient is φ = 6274174464.

The previous prime is 20957537479. The next prime is 20957537501. The reversal of 20957537484 is 48473575902.

It is a happy number.

20957537484 is a `hidden beast` number, since 2 + 0 + 95 + 75 + 3 + 7 + 484 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 20957537484.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149769 + ... + 253664.

It is an arithmetic number, because the mean of its divisors is an integer number (625995090).

Almost surely, 2^20957537484 is an apocalyptic number.

It is an amenable number.

20957537484 is an abundant number, since it is smaller than the sum of its proper divisors (39137991156).

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

20957537484 is a wasteful number, since it uses less digits than its factorization.

20957537484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403496 (or 403488 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 54.

The spelling of 20957537484 in words is "twenty billion, nine hundred fifty-seven million, five hundred thirty-seven thousand, four hundred eighty-four".