18537811459 has 2 divisors, whose sum is σ = 18537811460. Its totient is φ = 18537811458.

The previous prime is 18537811417. The next prime is 18537811471. The reversal of 18537811459 is 95411873581.

It is a strong prime.

It is an emirp because it is prime and its reverse (95411873581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18537811459 - 2⁹ = 18537810947 is a prime.

It is not a weakly prime, because it can be changed into another prime (18537811499) 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, 9268905729 + 9268905730.

It is an arithmetic number, because the mean of its divisors is an integer number (9268905730).

Almost surely, 2^18537811459 is an apocalyptic number.

18537811459 is a deficient number, since it is larger than the sum of its proper divisors (1).

18537811459 is an equidigital number, since it uses as much as digits as its factorization.

18537811459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 52.

The spelling of 18537811459 in words is "eighteen billion, five hundred thirty-seven million, eight hundred eleven thousand, four hundred fifty-nine".