18516372272 has 20 divisors (see below), whose sum is σ = 37435275120. Its totient is φ = 8855656128.

The previous prime is 18516372263. The next prime is 18516372283. The reversal of 18516372272 is 27227361581.

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, 25157747 + ... + 25158482.

It is an arithmetic number, because the mean of its divisors is an integer number (1871763756).

Almost surely, 2^18516372272 is an apocalyptic number.

It is an amenable number.

18516372272 is an abundant number, since it is smaller than the sum of its proper divisors (18918902848).

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

18516372272 is a wasteful number, since it uses less digits than its factorization.

18516372272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50316260 (or 50316254 counting only the distinct ones).

The product of its digits is 282240, while the sum is 44.

The spelling of 18516372272 in words is "eighteen billion, five hundred sixteen million, three hundred seventy-two thousand, two hundred seventy-two".