18008164 has 12 divisors (see below), whose sum is σ = 31675644. Its totient is φ = 8957984.

The previous prime is 18008161. The next prime is 18008167. The reversal of 18008164 is 46180081.

It is an interprime number because it is at equal distance from previous prime (18008161) and next prime (18008167).

It can be written as a sum of positive squares in 2 ways, for example, as 11505664 + 6502500 = 3392^2 + 2550^2 .

It is not an unprimeable number, because it can be changed into a prime (18008161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10639 + ... + 12214.

It is an arithmetic number, because the mean of its divisors is an integer number (2639637).

Almost surely, 2^18008164 is an apocalyptic number.

It is an amenable number.

18008164 is a deficient number, since it is larger than the sum of its proper divisors (13667480).

18008164 is a wasteful number, since it uses less digits than its factorization.

18008164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23054 (or 23052 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 18008164 is about 4243.6027146754. The cubic root of 18008164 is about 262.1137551595.

The spelling of 18008164 in words is "eighteen million, eight thousand, one hundred sixty-four".