18039979368 has 64 divisors (see below), whose sum is σ = 50122248000. Its totient is φ = 6011983296.

The previous prime is 18039979249. The next prime is 18039979409. The reversal of 18039979368 is 86397993081.

18039979368 is a `hidden beast` number, since 180 + 3 + 9 + 97 + 9 + 368 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1605546 + ... + 1616742.

It is an arithmetic number, because the mean of its divisors is an integer number (783160125).

Almost surely, 2^18039979368 is an apocalyptic number.

18039979368 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18039979368 is an abundant number, since it is smaller than the sum of its proper divisors (32082268632).

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

18039979368 is a wasteful number, since it uses less digits than its factorization.

18039979368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18671 (or 18661 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 63.

The spelling of 18039979368 in words is "eighteen billion, thirty-nine million, nine hundred seventy-nine thousand, three hundred sixty-eight".