18169164 has 48 divisors (see below), whose sum is σ = 50732640. Its totient is φ = 5590080.

The previous prime is 18169159. The next prime is 18169169. The reversal of 18169164 is 46196181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18169159) and next prime (18169169).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18169169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5067 + ... + 7874.

It is an arithmetic number, because the mean of its divisors is an integer number (1056930).

Almost surely, 2^18169164 is an apocalyptic number.

It is an amenable number.

18169164 is an abundant number, since it is smaller than the sum of its proper divisors (32563476).

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

18169164 is a wasteful number, since it uses less digits than its factorization.

18169164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12967 (or 12959 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 18169164 is about 4262.5302344969. The cubic root of 18169164 is about 262.8925717953.

The spelling of 18169164 in words is "eighteen million, one hundred sixty-nine thousand, one hundred sixty-four".