18224879 has 2 divisors, whose sum is σ = 18224880. Its totient is φ = 18224878.

The previous prime is 18224863. The next prime is 18224897. The reversal of 18224879 is 97842281.

Together with next prime (18224897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18224879 - 2⁴ = 18224863 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18224849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9112439 + 9112440.

It is an arithmetic number, because the mean of its divisors is an integer number (9112440).

Almost surely, 2^18224879 is an apocalyptic number.

18224879 is a deficient number, since it is larger than the sum of its proper divisors (1).

18224879 is an equidigital number, since it uses as much as digits as its factorization.

18224879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 41.

The square root of 18224879 is about 4269.0606695150. The cubic root of 18224879 is about 263.1610140409.

The spelling of 18224879 in words is "eighteen million, two hundred twenty-four thousand, eight hundred seventy-nine".