18444668 has 24 divisors (see below), whose sum is σ = 37067520. Its totient is φ = 7942320.

The previous prime is 18444661. The next prime is 18444703. The reversal of 18444668 is 86644481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18444661) 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 7 ways as a sum of consecutive naturals, for example, 10196 + ... + 11867.

It is an arithmetic number, because the mean of its divisors is an integer number (1544480).

Almost surely, 2^18444668 is an apocalyptic number.

It is an amenable number.

18444668 is an abundant number, since it is smaller than the sum of its proper divisors (18622852).

18444668 is a wasteful number, since it uses less digits than its factorization.

18444668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22097 (or 22095 counting only the distinct ones).

The product of its digits is 147456, while the sum is 41.

The square root of 18444668 is about 4294.7256024105. The cubic root of 18444668 is about 264.2146822775.

The spelling of 18444668 in words is "eighteen million, four hundred forty-four thousand, six hundred sixty-eight".