18744668 has 12 divisors (see below), whose sum is σ = 33142032. Its totient is φ = 9275520.

The previous prime is 18744641. The next prime is 18744683. The reversal of 18744668 is 86644781.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23768 + ... + 24543.

It is an arithmetic number, because the mean of its divisors is an integer number (2761836).

Almost surely, 2^18744668 is an apocalyptic number.

It is an amenable number.

18744668 is a deficient number, since it is larger than the sum of its proper divisors (14397364).

18744668 is a wasteful number, since it uses less digits than its factorization.

18744668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48412 (or 48410 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 18744668 is about 4329.5112888177. The cubic root of 18744668 is about 265.6394572616.

The spelling of 18744668 in words is "eighteen million, seven hundred forty-four thousand, six hundred sixty-eight".