18136948872 has 32 divisors (see below), whose sum is σ = 51819854400. Its totient is φ = 5181985344.

The previous prime is 18136948853. The next prime is 18136948901. The reversal of 18136948872 is 27884963181.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53978847 + ... + 53979182.

It is an arithmetic number, because the mean of its divisors is an integer number (1619370450).

Almost surely, 2^18136948872 is an apocalyptic number.

18136948872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18136948872 is an abundant number, since it is smaller than the sum of its proper divisors (33682905528).

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

18136948872 is a wasteful number, since it uses less digits than its factorization.

18136948872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107958045 (or 107958041 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 57.

The spelling of 18136948872 in words is "eighteen billion, one hundred thirty-six million, nine hundred forty-eight thousand, eight hundred seventy-two".