18156093992 has 32 divisors (see below), whose sum is σ = 34850217600. Its totient is φ = 8862895104.

The previous prime is 18156093973. The next prime is 18156094037. The reversal of 18156093992 is 29939065181.

It is a happy number.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 830984 + ... + 852552.

It is an arithmetic number, because the mean of its divisors is an integer number (1089069300).

Almost surely, 2^18156093992 is an apocalyptic number.

It is an amenable number.

18156093992 is a deficient number, since it is larger than the sum of its proper divisors (16694123608).

18156093992 is a wasteful number, since it uses less digits than its factorization.

18156093992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24065 (or 24061 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 53.

The spelling of 18156093992 in words is "eighteen billion, one hundred fifty-six million, ninety-three thousand, nine hundred ninety-two".