18318806 has 8 divisors (see below), whose sum is σ = 29976264. Its totient is φ = 8326720.

The previous prime is 18318791. The next prime is 18318821. The reversal of 18318806 is 60881381.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18318791) and next prime (18318821).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 416315 + ... + 416358.

It is an arithmetic number, because the mean of its divisors is an integer number (3747033).

Almost surely, 2^18318806 is an apocalyptic number.

18318806 is a deficient number, since it is larger than the sum of its proper divisors (11657458).

18318806 is a wasteful number, since it uses less digits than its factorization.

18318806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832686.

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

The square root of 18318806 is about 4280.0474296437. The cubic root of 18318806 is about 263.6123308399.

The spelling of 18318806 in words is "eighteen million, three hundred eighteen thousand, eight hundred six".