18208664 has 16 divisors (see below), whose sum is σ = 34186920. Its totient is φ = 9092160.

The previous prime is 18208661. The next prime is 18208681. The reversal of 18208664 is 46680281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18208661) by changing a digit.

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, 9707 + ... + 11429.

Almost surely, 2^18208664 is an apocalyptic number.

It is an amenable number.

18208664 is a deficient number, since it is larger than the sum of its proper divisors (15978256).

18208664 is a wasteful number, since it uses less digits than its factorization.

18208664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3050 (or 3046 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 18208664 is about 4267.1611171832. The cubic root of 18208664 is about 263.0829445333.

The spelling of 18208664 in words is "eighteen million, two hundred eight thousand, six hundred sixty-four".