20638858876 has 24 divisors (see below), whose sum is σ = 36270208800. Its totient is φ = 10276032000.

The previous prime is 20638858873. The next prime is 20638858937. The reversal of 20638858876 is 67885883602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20638858873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950056 + ... + 971536.

It is an arithmetic number, because the mean of its divisors is an integer number (1511258700).

Almost surely, 2^20638858876 is an apocalyptic number.

It is an amenable number.

20638858876 is a deficient number, since it is larger than the sum of its proper divisors (15631349924).

20638858876 is a wasteful number, since it uses less digits than its factorization.

20638858876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22485 (or 22483 counting only the distinct ones).

The product of its (nonzero) digits is 30965760, while the sum is 61.

The spelling of 20638858876 in words is "twenty billion, six hundred thirty-eight million, eight hundred fifty-eight thousand, eight hundred seventy-six".