20508876504 has 24 divisors (see below), whose sum is σ = 55544874060. Its totient is φ = 6836292144.

The previous prime is 20508876503. The next prime is 20508876511. The reversal of 20508876504 is 40567880502.

20508876504 is a `hidden beast` number, since 2 + 0 + 508 + 87 + 65 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×20508876504² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20508876504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20508876503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 142422682 + ... + 142422825.

Almost surely, 2^20508876504 is an apocalyptic number.

20508876504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20508876504 is an abundant number, since it is smaller than the sum of its proper divisors (35035997556).

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

20508876504 is a wasteful number, since it uses less digits than its factorization.

20508876504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284845519 (or 284845512 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 20508876504 in words is "twenty billion, five hundred eight million, eight hundred seventy-six thousand, five hundred four".