18498772672 has 28 divisors (see below), whose sum is σ = 38304526896. Its totient is φ = 8847238400.

The previous prime is 18498772627. The next prime is 18498772703. The reversal of 18498772672 is 27627789481.

It is a self number, because there is not a number n which added to its sum of digits gives 18498772672.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6282079 + ... + 6285022.

Almost surely, 2^18498772672 is an apocalyptic number.

It is an amenable number.

18498772672 is an abundant number, since it is smaller than the sum of its proper divisors (19805754224).

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

18498772672 is a wasteful number, since it uses less digits than its factorization.

18498772672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12567136 (or 12567126 counting only the distinct ones).

The product of its digits is 18966528, while the sum is 61.

The spelling of 18498772672 in words is "eighteen billion, four hundred ninety-eight million, seven hundred seventy-two thousand, six hundred seventy-two".