18008955 has 12 divisors (see below), whose sum is σ = 31215600. Its totient is φ = 9604752.

The previous prime is 18008917. The next prime is 18008989. The reversal of 18008955 is 55980081.

It is not a de Polignac number, because 18008955 - 2¹⁴ = 17992571 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 200055 + ... + 200144.

It is an arithmetic number, because the mean of its divisors is an integer number (2601300).

Almost surely, 2^18008955 is an apocalyptic number.

18008955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18008955 is a deficient number, since it is larger than the sum of its proper divisors (13206645).

18008955 is a wasteful number, since it uses less digits than its factorization.

18008955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400210 (or 400207 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The square root of 18008955 is about 4243.6959127628. The cubic root of 18008955 is about 262.1175928438.

The spelling of 18008955 in words is "eighteen million, eight thousand, nine hundred fifty-five".