18566995459 has 2 divisors, whose sum is σ = 18566995460. Its totient is φ = 18566995458.

The previous prime is 18566995441. The next prime is 18566995481. The reversal of 18566995459 is 95459966581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18566995459 - 2¹³ = 18566987267 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18566995394 and 18566995403.

It is not a weakly prime, because it can be changed into another prime (18566995259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9283497729 + 9283497730.

It is an arithmetic number, because the mean of its divisors is an integer number (9283497730).

Almost surely, 2^18566995459 is an apocalyptic number.

18566995459 is a deficient number, since it is larger than the sum of its proper divisors (1).

18566995459 is an equidigital number, since it uses as much as digits as its factorization.

18566995459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976000, while the sum is 67.

The spelling of 18566995459 in words is "eighteen billion, five hundred sixty-six million, nine hundred ninety-five thousand, four hundred fifty-nine".