18668579 has 8 divisors (see below), whose sum is σ = 19248240. Its totient is φ = 18095616.

The previous prime is 18668557. The next prime is 18668581. The reversal of 18668579 is 97586681.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18668579 - 2⁸ = 18668323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18668549) 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, 4307 + ... + 7475.

It is an arithmetic number, because the mean of its divisors is an integer number (2406030).

Almost surely, 2^18668579 is an apocalyptic number.

18668579 is a deficient number, since it is larger than the sum of its proper divisors (579661).

18668579 is a wasteful number, since it uses less digits than its factorization.

18668579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3349.

The product of its digits is 725760, while the sum is 50.

The square root of 18668579 is about 4320.7151028505. The cubic root of 18668579 is about 265.2795388882.

The spelling of 18668579 in words is "eighteen million, six hundred sixty-eight thousand, five hundred seventy-nine".