18372718115 has 16 divisors (see below), whose sum is σ = 22310445600. Its totient is φ = 14522948352.

The previous prime is 18372718109. The next prime is 18372718151. The reversal of 18372718115 is 51181727381.

It is a Cunningham number, because it is equal to 135546²-1.

It is a cyclic number.

It is not a de Polignac number, because 18372718115 - 2⁴ = 18372718099 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 664181 + ... + 691289.

It is an arithmetic number, because the mean of its divisors is an integer number (1394402850).

Almost surely, 2^18372718115 is an apocalyptic number.

18372718115 is a deficient number, since it is larger than the sum of its proper divisors (3937727485).

18372718115 is a wasteful number, since it uses less digits than its factorization.

18372718115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28726.

The product of its digits is 94080, while the sum is 44.

The spelling of 18372718115 in words is "eighteen billion, three hundred seventy-two million, seven hundred eighteen thousand, one hundred fifteen".