18317507979 has 8 divisors (see below), whose sum is σ = 24424405200. Its totient is φ = 12211141376.

The previous prime is 18317507969. The next prime is 18317508017. The reversal of 18317507979 is 97970571381.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18317507979 - 2⁷ = 18317507851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18317507959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43554 + ... + 196295.

It is an arithmetic number, because the mean of its divisors is an integer number (3053050650).

Almost surely, 2^18317507979 is an apocalyptic number.

18317507979 is a deficient number, since it is larger than the sum of its proper divisors (6106897221).

18317507979 is a wasteful number, since it uses less digits than its factorization.

18317507979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265309.

The product of its (nonzero) digits is 3333960, while the sum is 57.

The spelling of 18317507979 in words is "eighteen billion, three hundred seventeen million, five hundred seven thousand, nine hundred seventy-nine".