18817045079 has 12 divisors (see below), whose sum is σ = 22042518192. Its totient is φ = 15735498240.

The previous prime is 18817045063. The next prime is 18817045081. The reversal of 18817045079 is 97054071881.

It is not a de Polignac number, because 18817045079 - 2⁴ = 18817045063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18817045019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 787802 + ... + 811335.

It is an arithmetic number, because the mean of its divisors is an integer number (1836876516).

Almost surely, 2^18817045079 is an apocalyptic number.

18817045079 is a deficient number, since it is larger than the sum of its proper divisors (3225473113).

18817045079 is an equidigital number, since it uses as much as digits as its factorization.

18817045079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599226 (or 1599185 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 50.

The spelling of 18817045079 in words is "eighteen billion, eight hundred seventeen million, forty-five thousand, seventy-nine".