18167992185 has 32 divisors (see below), whose sum is σ = 34969973760. Its totient is φ = 7868242368.

The previous prime is 18167992163. The next prime is 18167992187. The reversal of 18167992185 is 58129976181.

It is not a de Polignac number, because 18167992185 - 2¹² = 18167988089 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18167992187) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4551387 + ... + 4555376.

It is an arithmetic number, because the mean of its divisors is an integer number (1092811680).

Almost surely, 2^18167992185 is an apocalyptic number.

18167992185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18167992185 is a deficient number, since it is larger than the sum of its proper divisors (16801981575).

18167992185 is a wasteful number, since it uses less digits than its factorization.

18167992185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9106797.

The product of its digits is 2177280, while the sum is 57.

It can be divided in two parts, 1816 and 7992185, that added together give a triangular number (7994001 = T₃₉₉₈).

The spelling of 18167992185 in words is "eighteen billion, one hundred sixty-seven million, nine hundred ninety-two thousand, one hundred eighty-five".