20557688874 has 64 divisors (see below), whose sum is σ = 42978263040. Its totient is φ = 6548040000.

The previous prime is 20557688869. The next prime is 20557688953. The reversal of 20557688874 is 47888675502.

It is a super-3 number, since 3×20557688874³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8095497 + ... + 8098035.

It is an arithmetic number, because the mean of its divisors is an integer number (671535360).

Almost surely, 2^20557688874 is an apocalyptic number.

20557688874 is an abundant number, since it is smaller than the sum of its proper divisors (22420574166).

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

20557688874 is a wasteful number, since it uses less digits than its factorization.

20557688874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3107.

The product of its (nonzero) digits is 30105600, while the sum is 60.

The spelling of 20557688874 in words is "twenty billion, five hundred fifty-seven million, six hundred eighty-eight thousand, eight hundred seventy-four".