18639849304908 has 72 divisors (see below), whose sum is σ = 51921854192208. Its totient is φ = 5601958282368.

The previous prime is 18639849304873. The next prime is 18639849304939. The reversal of 18639849304908 is 80940394893681.

18639849304908 is a `hidden beast` number, since 1 + 8 + 6 + 3 + 98 + 49 + 3 + 0 + 490 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 463104735 + ... + 463144982.

Almost surely, 2^{18639849304908} is an apocalyptic number.

18639849304908 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18639849304908 is an abundant number, since it is smaller than the sum of its proper divisors (33282004887300).

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

18639849304908 is a wasteful number, since it uses less digits than its factorization.

18639849304908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926249783 (or 926249778 counting only the distinct ones).

The product of its (nonzero) digits is 322486272, while the sum is 72.

The spelling of 18639849304908 in words is "eighteen trillion, six hundred thirty-nine billion, eight hundred forty-nine million, three hundred four thousand, nine hundred eight".