20807587936 has 24 divisors (see below), whose sum is σ = 41005125504. Its totient is φ = 10393587840.

The previous prime is 20807587921. The next prime is 20807587961. The reversal of 20807587936 is 63978570802.

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, 285760 + ... + 351103.

It is an arithmetic number, because the mean of its divisors is an integer number (1708546896).

Almost surely, 2^20807587936 is an apocalyptic number.

It is an amenable number.

20807587936 is a deficient number, since it is larger than the sum of its proper divisors (20197537568).

20807587936 is a wasteful number, since it uses less digits than its factorization.

20807587936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637894 (or 637886 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 20807587936 in words is "twenty billion, eight hundred seven million, five hundred eighty-seven thousand, nine hundred thirty-six".