20625636504 has 64 divisors (see below), whose sum is σ = 59212368000. Its totient is φ = 5921233920.

The previous prime is 20625636491. The next prime is 20625636527. The reversal of 20625636504 is 40563652602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2050969 + ... + 2061000.

It is an arithmetic number, because the mean of its divisors is an integer number (925193250).

Almost surely, 2^20625636504 is an apocalyptic number.

20625636504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20625636504 is an abundant number, since it is smaller than the sum of its proper divisors (38586731496).

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

20625636504 is a wasteful number, since it uses less digits than its factorization.

20625636504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4112008 (or 4112004 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 39.

The spelling of 20625636504 in words is "twenty billion, six hundred twenty-five million, six hundred thirty-six thousand, five hundred four".