18372718116 has 243 divisors, whose sum is σ = 52031913843. Its totient is φ = 5465214720.

The previous prime is 18372718109. The next prime is 18372718151. The reversal of 18372718116 is 61181727381.

The square root of 18372718116 is 135546.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 4851679716 + 13521038400 = 69654^2 + 116280^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 448115056 + ... + 448115096.

Almost surely, 2^18372718116 is an apocalyptic number.

18372718116 is the 135546-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18372718116

18372718116 is an abundant number, since it is smaller than the sum of its proper divisors (33659195727).

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

18372718116 is a wasteful number, since it uses less digits than its factorization.

18372718116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 94 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The spelling of 18372718116 in words is "eighteen billion, three hundred seventy-two million, seven hundred eighteen thousand, one hundred sixteen".