18639959003788 has 6 divisors (see below), whose sum is σ = 32619928256636. Its totient is φ = 9319979501892.

The previous prime is 18639959003779. The next prime is 18639959003791. The reversal of 18639959003788 is 88730095993681.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2329994875470 + ... + 2329994875477.

Almost surely, 2^{18639959003788} is an apocalyptic number.

It is an amenable number.

18639959003788 is a deficient number, since it is larger than the sum of its proper divisors (13979969252848).

18639959003788 is a wasteful number, since it uses less digits than its factorization.

18639959003788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4659989750951 (or 4659989750949 counting only the distinct ones).

The product of its (nonzero) digits is 705438720, while the sum is 76.

The spelling of 18639959003788 in words is "eighteen trillion, six hundred thirty-nine billion, nine hundred fifty-nine million, three thousand, seven hundred eighty-eight".