20388057568 has 36 divisors (see below), whose sum is σ = 42639013872. Its totient is φ = 9594375680.

The previous prime is 20388057533. The next prime is 20388057581. The reversal of 20388057568 is 86575088302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1093048 + ... + 1111543.

It is an arithmetic number, because the mean of its divisors is an integer number (1184417052).

Almost surely, 2^20388057568 is an apocalyptic number.

It is an amenable number.

20388057568 is an abundant number, since it is smaller than the sum of its proper divisors (22250956304).

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

20388057568 is a wasteful number, since it uses less digits than its factorization.

20388057568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204635 (or 2204610 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 52.

The spelling of 20388057568 in words is "twenty billion, three hundred eighty-eight million, fifty-seven thousand, five hundred sixty-eight".