18606156172 has 12 divisors (see below), whose sum is σ = 32569993456. Its totient is φ = 9300443760.

The previous prime is 18606156143. The next prime is 18606156187. The reversal of 18606156172 is 27165160681.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642648 + ... + 670975.

Almost surely, 2^18606156172 is an apocalyptic number.

It is an amenable number.

18606156172 is a deficient number, since it is larger than the sum of its proper divisors (13963837284).

18606156172 is a wasteful number, since it uses less digits than its factorization.

18606156172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317168 (or 1317166 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 18606156172 in words is "eighteen billion, six hundred six million, one hundred fifty-six thousand, one hundred seventy-two".