20959597675 has 12 divisors (see below), whose sum is σ = 25995231040. Its totient is φ = 16764239520.

The previous prime is 20959597651. The next prime is 20959597679. The reversal of 20959597675 is 57679595902.

It is not a de Polignac number, because 20959597675 - 2²³ = 20951209067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20959597679) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42121 + ... + 209029.

Almost surely, 2^20959597675 is an apocalyptic number.

20959597675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20959597675 is a deficient number, since it is larger than the sum of its proper divisors (5035633365).

20959597675 is a wasteful number, since it uses less digits than its factorization.

20959597675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171942 (or 171937 counting only the distinct ones).

The product of its (nonzero) digits is 53581500, while the sum is 64.

The spelling of 20959597675 in words is "twenty billion, nine hundred fifty-nine million, five hundred ninety-seven thousand, six hundred seventy-five".