18504845459 has 2 divisors, whose sum is σ = 18504845460. Its totient is φ = 18504845458.

The previous prime is 18504845453. The next prime is 18504845473. The reversal of 18504845459 is 95454840581.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18504845459 is a prime.

It is a super-2 number, since 2×18504845459² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18504845459.

It is not a weakly prime, because it can be changed into another prime (18504845453) 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, 9252422729 + 9252422730.

It is an arithmetic number, because the mean of its divisors is an integer number (9252422730).

Almost surely, 2^18504845459 is an apocalyptic number.

18504845459 is a deficient number, since it is larger than the sum of its proper divisors (1).

18504845459 is an equidigital number, since it uses as much as digits as its factorization.

18504845459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608000, while the sum is 53.

The spelling of 18504845459 in words is "eighteen billion, five hundred four million, eight hundred forty-five thousand, four hundred fifty-nine".