18604879 has 2 divisors, whose sum is σ = 18604880. Its totient is φ = 18604878.

The previous prime is 18604871. The next prime is 18604889. The reversal of 18604879 is 97840681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18604879 - 2³ = 18604871 is a prime.

It is a super-2 number, since 2×18604879² = 692283045209282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18604871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9302439 + 9302440.

It is an arithmetic number, because the mean of its divisors is an integer number (9302440).

Almost surely, 2^18604879 is an apocalyptic number.

18604879 is a deficient number, since it is larger than the sum of its proper divisors (1).

18604879 is an equidigital number, since it uses as much as digits as its factorization.

18604879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 18604879 is about 4313.3373389987. The cubic root of 18604879 is about 264.9774704948.

It can be divided in two parts, 1860487 and 9, that added together give a square (1860496 = 1364²).

The spelling of 18604879 in words is "eighteen million, six hundred four thousand, eight hundred seventy-nine".