20557688876 has 6 divisors (see below), whose sum is σ = 35975955540. Its totient is φ = 10278844436.

The previous prime is 20557688869. The next prime is 20557688953. The reversal of 20557688876 is 67888675502.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2569711106 + ... + 2569711113.

It is an arithmetic number, because the mean of its divisors is an integer number (5995992590).

Almost surely, 2^20557688876 is an apocalyptic number.

It is an amenable number.

20557688876 is a deficient number, since it is larger than the sum of its proper divisors (15418266664).

20557688876 is a wasteful number, since it uses less digits than its factorization.

20557688876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5139422223 (or 5139422221 counting only the distinct ones).

The product of its (nonzero) digits is 45158400, while the sum is 62.

The spelling of 20557688876 in words is "twenty billion, five hundred fifty-seven million, six hundred eighty-eight thousand, eight hundred seventy-six".