18164156 has 6 divisors (see below), whose sum is σ = 31787280. Its totient is φ = 9082076.

The previous prime is 18164149. The next prime is 18164161. The reversal of 18164156 is 65146181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2270516 + ... + 2270523.

It is an arithmetic number, because the mean of its divisors is an integer number (5297880).

Almost surely, 2^18164156 is an apocalyptic number.

It is an amenable number.

18164156 is a deficient number, since it is larger than the sum of its proper divisors (13623124).

18164156 is a wasteful number, since it uses less digits than its factorization.

18164156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4541043 (or 4541041 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The square root of 18164156 is about 4261.9427494982. The cubic root of 18164156 is about 262.8684157219.

The spelling of 18164156 in words is "eighteen million, one hundred sixty-four thousand, one hundred fifty-six".