18083618 has 16 divisors (see below), whose sum is σ = 31527360. Its totient is φ = 7618416.

The previous prime is 18083603. The next prime is 18083623. The reversal of 18083618 is 81638081.

It is a happy number.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 10121 + ... + 11772.

It is an arithmetic number, because the mean of its divisors is an integer number (1970460).

Almost surely, 2^18083618 is an apocalyptic number.

18083618 is a deficient number, since it is larger than the sum of its proper divisors (13443742).

18083618 is a wasteful number, since it uses less digits than its factorization.

18083618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21961.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 18083618 is about 4252.4837448249. The cubic root of 18083618 is about 262.4793295893.

The spelling of 18083618 in words is "eighteen million, eighty-three thousand, six hundred eighteen".