20507653368 has 48 divisors (see below), whose sum is σ = 56589525720. Its totient is φ = 6706904256.

The previous prime is 20507653357. The next prime is 20507653391. The reversal of 20507653368 is 86335670502.

20507653368 is a `hidden beast` number, since 2 + 0 + 50 + 7 + 6 + 533 + 68 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2683246 + ... + 2690877.

Almost surely, 2^20507653368 is an apocalyptic number.

It is an amenable number.

20507653368 is an abundant number, since it is smaller than the sum of its proper divisors (36081872352).

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

20507653368 is a wasteful number, since it uses less digits than its factorization.

20507653368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5374188 (or 5374181 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 20507653368 in words is "twenty billion, five hundred seven million, six hundred fifty-three thousand, three hundred sixty-eight".