18479097317 has 2 divisors, whose sum is σ = 18479097318. Its totient is φ = 18479097316.

The previous prime is 18479097293. The next prime is 18479097409. The reversal of 18479097317 is 71379097481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16061506756 + 2417590561 = 126734^2 + 49169^2 .

It is a cyclic number.

It is not a de Polignac number, because 18479097317 - 2¹⁸ = 18478835173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18479097017) 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, 9239548658 + 9239548659.

It is an arithmetic number, because the mean of its divisors is an integer number (9239548659).

Almost surely, 2^18479097317 is an apocalyptic number.

It is an amenable number.

18479097317 is a deficient number, since it is larger than the sum of its proper divisors (1).

18479097317 is an equidigital number, since it uses as much as digits as its factorization.

18479097317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2667168, while the sum is 56.

The spelling of 18479097317 in words is "eighteen billion, four hundred seventy-nine million, ninety-seven thousand, three hundred seventeen".