20902577472 has 140 divisors (see below), whose sum is σ = 70813594720. Its totient is φ = 5972154624.

The previous prime is 20902577471. The next prime is 20902577497. The reversal of 20902577472 is 27477520902.

20902577472 is a `hidden beast` number, since 2 + 0 + 9 + 0 + 2 + 577 + 4 + 72 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20902577471) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 251722 + ... + 324297.

Almost surely, 2^20902577472 is an apocalyptic number.

It is an amenable number.

20902577472 is an abundant number, since it is smaller than the sum of its proper divisors (49911017248).

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

20902577472 is an equidigital number, since it uses as much as digits as its factorization.

20902577472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576050 (or 576031 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 45.

The spelling of 20902577472 in words is "twenty billion, nine hundred two million, five hundred seventy-seven thousand, four hundred seventy-two".