18556000459 has 2 divisors, whose sum is σ = 18556000460. Its totient is φ = 18556000458.

The previous prime is 18556000417. The next prime is 18556000511. The reversal of 18556000459 is 95400065581.

It is a weak prime.

It is an emirp because it is prime and its reverse (95400065581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18556000459 - 2¹¹ = 18555998411 is a prime.

It is not a weakly prime, because it can be changed into another prime (18556600459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9278000229 + 9278000230.

It is an arithmetic number, because the mean of its divisors is an integer number (9278000230).

Almost surely, 2^18556000459 is an apocalyptic number.

18556000459 is a deficient number, since it is larger than the sum of its proper divisors (1).

18556000459 is an equidigital number, since it uses as much as digits as its factorization.

18556000459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 43.

The spelling of 18556000459 in words is "eighteen billion, five hundred fifty-six million, four hundred fifty-nine", and thus it is an aban number.