20487864504 has 16 divisors (see below), whose sum is σ = 51219661320. Its totient is φ = 6829288160.

The previous prime is 20487864499. The next prime is 20487864539. The reversal of 20487864504 is 40546878402.

It is a congruent number.

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, 426830487 + ... + 426830534.

Almost surely, 2^20487864504 is an apocalyptic number.

20487864504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20487864504 is an abundant number, since it is smaller than the sum of its proper divisors (30731796816).

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

20487864504 is a wasteful number, since it uses less digits than its factorization.

20487864504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853661030 (or 853661026 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 48.

The spelling of 20487864504 in words is "twenty billion, four hundred eighty-seven million, eight hundred sixty-four thousand, five hundred four".