18712415459 has 2 divisors, whose sum is σ = 18712415460. Its totient is φ = 18712415458.

The previous prime is 18712415429. The next prime is 18712415537. The reversal of 18712415459 is 95451421781.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18712415459 - 2¹⁶ = 18712349923 is a prime.

It is not a weakly prime, because it can be changed into another prime (18712415429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9356207729 + 9356207730.

It is an arithmetic number, because the mean of its divisors is an integer number (9356207730).

Almost surely, 2^18712415459 is an apocalyptic number.

18712415459 is a deficient number, since it is larger than the sum of its proper divisors (1).

18712415459 is an equidigital number, since it uses as much as digits as its factorization.

18712415459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 47.

The spelling of 18712415459 in words is "eighteen billion, seven hundred twelve million, four hundred fifteen thousand, four hundred fifty-nine".