18808618 has 16 divisors (see below), whose sum is σ = 29926656. Its totient is φ = 8846640.

The previous prime is 18808589. The next prime is 18808619. The reversal of 18808618 is 81680881.

It is a super-2 number, since 2×18808618² = 707528222139848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18808619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546 + ... + 6157.

It is an arithmetic number, because the mean of its divisors is an integer number (1870416).

Almost surely, 2^18808618 is an apocalyptic number.

18808618 is a deficient number, since it is larger than the sum of its proper divisors (11118038).

18808618 is a wasteful number, since it uses less digits than its factorization.

18808618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6789.

The product of its (nonzero) digits is 24576, while the sum is 40.

The square root of 18808618 is about 4336.8903606155. The cubic root of 18808618 is about 265.9412028258.

The spelling of 18808618 in words is "eighteen million, eight hundred eight thousand, six hundred eighteen".