18668375 has 16 divisors (see below), whose sum is σ = 25418016. Its totient is φ = 13576000.

The previous prime is 18668369. The next prime is 18668381. The reversal of 18668375 is 57386681.

It is an interprime number because it is at equal distance from previous prime (18668369) and next prime (18668381).

It is not a de Polignac number, because 18668375 - 2⁸ = 18668119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5414 + ... + 8163.

It is an arithmetic number, because the mean of its divisors is an integer number (1588626).

Almost surely, 2^18668375 is an apocalyptic number.

18668375 is a deficient number, since it is larger than the sum of its proper divisors (6749641).

18668375 is a wasteful number, since it uses less digits than its factorization.

18668375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13603 (or 13593 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The square root of 18668375 is about 4320.6914955826. The cubic root of 18668375 is about 265.2785726082.

The spelling of 18668375 in words is "eighteen million, six hundred sixty-eight thousand, three hundred seventy-five".