18860477788 has 12 divisors (see below), whose sum is σ = 33021665712. Its totient is φ = 9425716160.

The previous prime is 18860477759. The next prime is 18860477833. The reversal of 18860477788 is 88777406881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1121293 + ... + 1137988.

It is an arithmetic number, because the mean of its divisors is an integer number (2751805476).

Almost surely, 2^18860477788 is an apocalyptic number.

It is an amenable number.

18860477788 is a deficient number, since it is larger than the sum of its proper divisors (14161187924).

18860477788 is a wasteful number, since it uses less digits than its factorization.

18860477788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261372 (or 2261370 counting only the distinct ones).

The product of its (nonzero) digits is 33718272, while the sum is 64.

The spelling of 18860477788 in words is "eighteen billion, eight hundred sixty million, four hundred seventy-seven thousand, seven hundred eighty-eight".