18412879 has 2 divisors, whose sum is σ = 18412880. Its totient is φ = 18412878.

The previous prime is 18412859. The next prime is 18412931. The reversal of 18412879 is 97821481.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18412879 - 2⁵ = 18412847 is a prime.

It is a super-2 number, since 2×18412879² = 678068226137282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18412859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9206439 + 9206440.

It is an arithmetic number, because the mean of its divisors is an integer number (9206440).

Almost surely, 2^18412879 is an apocalyptic number.

18412879 is a deficient number, since it is larger than the sum of its proper divisors (1).

18412879 is an equidigital number, since it uses as much as digits as its factorization.

18412879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 40.

The square root of 18412879 is about 4291.0230714831. The cubic root of 18412879 is about 264.0628054967.

It can be divided in two parts, 18412 and 879, that added together give a palindrome (19291).

The spelling of 18412879 in words is "eighteen million, four hundred twelve thousand, eight hundred seventy-nine".