18366850005172 has 12 divisors (see below), whose sum is σ = 32373224830240. Its totient is φ = 9117357196536.

The previous prime is 18366850005149. The next prime is 18366850005191. The reversal of 18366850005172 is 27150005866381.

It is a super-2 number, since 2×18366850005172² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 16516950888 + ... + 16516951999.

Almost surely, 2^{18366850005172} is an apocalyptic number.

It is an amenable number.

18366850005172 is a deficient number, since it is larger than the sum of its proper divisors (14006374825068).

18366850005172 is a wasteful number, since it uses less digits than its factorization.

18366850005172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33033903030 (or 33033903028 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 52.

The spelling of 18366850005172 in words is "eighteen trillion, three hundred sixty-six billion, eight hundred fifty million, five thousand, one hundred seventy-two".