18490579 has 2 divisors, whose sum is σ = 18490580. Its totient is φ = 18490578.

The previous prime is 18490573. The next prime is 18490607. The reversal of 18490579 is 97509481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18490579 - 2¹⁵ = 18457811 is a prime.

It is not a weakly prime, because it can be changed into another prime (18490573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9245289 + 9245290.

It is an arithmetic number, because the mean of its divisors is an integer number (9245290).

Almost surely, 2^18490579 is an apocalyptic number.

18490579 is a deficient number, since it is larger than the sum of its proper divisors (1).

18490579 is an equidigital number, since it uses as much as digits as its factorization.

18490579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 18490579 is about 4300.0673250543. The cubic root of 18490579 is about 264.4337213611.

The spelling of 18490579 in words is "eighteen million, four hundred ninety thousand, five hundred seventy-nine".