18108155 has 16 divisors (see below), whose sum is σ = 23790144. Its totient is φ = 13150080.

The previous prime is 18108149. The next prime is 18108163. The reversal of 18108155 is 55180181.

It is not a de Polignac number, because 18108155 - 2⁶ = 18108091 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1682 + ... + 6248.

It is an arithmetic number, because the mean of its divisors is an integer number (1486884).

Almost surely, 2^18108155 is an apocalyptic number.

18108155 is a deficient number, since it is larger than the sum of its proper divisors (5681989).

18108155 is a wasteful number, since it uses less digits than its factorization.

18108155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4646.

The product of its (nonzero) digits is 1600, while the sum is 29.

The square root of 18108155 is about 4255.3677866901. The cubic root of 18108155 is about 262.5979921373.

The spelling of 18108155 in words is "eighteen million, one hundred eight thousand, one hundred fifty-five".