18618476017 has 2 divisors, whose sum is σ = 18618476018. Its totient is φ = 18618476016.

The previous prime is 18618475999. The next prime is 18618476021. The reversal of 18618476017 is 71067481681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12806090896 + 5812385121 = 113164^2 + 76239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18618476017 is a prime.

It is not a weakly prime, because it can be changed into another prime (18618426017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9309238008 + 9309238009.

It is an arithmetic number, because the mean of its divisors is an integer number (9309238009).

Almost surely, 2^18618476017 is an apocalyptic number.

It is an amenable number.

18618476017 is a deficient number, since it is larger than the sum of its proper divisors (1).

18618476017 is an equidigital number, since it uses as much as digits as its factorization.

18618476017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 49.

The spelling of 18618476017 in words is "eighteen billion, six hundred eighteen million, four hundred seventy-six thousand, seventeen".