20577648608 has 24 divisors (see below), whose sum is σ = 44195177880. Its totient is φ = 9353476480.

The previous prime is 20577648587. The next prime is 20577648661. The reversal of 20577648608 is 80684677502.

It is a self number, because there is not a number n which added to its sum of digits gives 20577648608.

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 3 ways as a sum of consecutive naturals, for example, 29229263 + ... + 29229966.

It is an arithmetic number, because the mean of its divisors is an integer number (1841465745).

Almost surely, 2^20577648608 is an apocalyptic number.

It is an amenable number.

20577648608 is an abundant number, since it is smaller than the sum of its proper divisors (23617529272).

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

20577648608 is a wasteful number, since it uses less digits than its factorization.

20577648608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58459250 (or 58459242 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 53.

The spelling of 20577648608 in words is "twenty billion, five hundred seventy-seven million, six hundred forty-eight thousand, six hundred eight".