18725166 has 24 divisors (see below), whose sum is σ = 40654224. Its totient is φ = 6228960.

The previous prime is 18725159. The next prime is 18725173. The reversal of 18725166 is 66152781.

It is an interprime number because it is at equal distance from previous prime (18725159) and next prime (18725173).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18725166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13015 + ... + 14381.

It is an arithmetic number, because the mean of its divisors is an integer number (1693926).

Almost surely, 2^18725166 is an apocalyptic number.

18725166 is an abundant number, since it is smaller than the sum of its proper divisors (21929058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18725166 is a wasteful number, since it uses less digits than its factorization.

18725166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136 (or 2133 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 18725166 is about 4327.2584854617. The cubic root of 18725166 is about 265.5473013067.

The spelling of 18725166 in words is "eighteen million, seven hundred twenty-five thousand, one hundred sixty-six".