18674812172 has 12 divisors (see below), whose sum is σ = 32688285000. Its totient is φ = 9335302176.

The previous prime is 18674812159. The next prime is 18674812183. The reversal of 18674812172 is 27121847681.

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 3 ways as a sum of consecutive naturals, for example, 505922 + ... + 541577.

It is an arithmetic number, because the mean of its divisors is an integer number (2724023750).

Almost surely, 2^18674812172 is an apocalyptic number.

It is an amenable number.

18674812172 is a deficient number, since it is larger than the sum of its proper divisors (14013472828).

18674812172 is a wasteful number, since it uses less digits than its factorization.

18674812172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051960 (or 1051958 counting only the distinct ones).

The product of its digits is 301056, while the sum is 47.

The spelling of 18674812172 in words is "eighteen billion, six hundred seventy-four million, eight hundred twelve thousand, one hundred seventy-two".