18338156 has 12 divisors (see below), whose sum is σ = 32163768. Its totient is φ = 9148512.

The previous prime is 18338149. The next prime is 18338161. The reversal of 18338156 is 65183381.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3041 + ... + 6776.

It is an arithmetic number, because the mean of its divisors is an integer number (2680314).

Almost surely, 2^18338156 is an apocalyptic number.

It is an amenable number.

18338156 is a deficient number, since it is larger than the sum of its proper divisors (13825612).

18338156 is a wasteful number, since it uses less digits than its factorization.

18338156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10288 (or 10286 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 18338156 is about 4282.3073219936. The cubic root of 18338156 is about 263.7051153377.

The spelling of 18338156 in words is "eighteen million, three hundred thirty-eight thousand, one hundred fifty-six".