18336666852017 has 4 divisors (see below), whose sum is σ = 18336688743780. Its totient is φ = 18336644960256.

The previous prime is 18336666851999. The next prime is 18336666852019. The reversal of 18336666852017 is 71025866663381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6005641310881 + 12331025541136 = 2450641^2 + 3511556^2 .

It is a cyclic number.

It is not a de Polignac number, because 18336666852017 - 2¹⁰ = 18336666850993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18336666852019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9637328 + ... + 11382065.

It is an arithmetic number, because the mean of its divisors is an integer number (4584172185945).

Almost surely, 2^{18336666852017} is an apocalyptic number.

It is an amenable number.

18336666852017 is a deficient number, since it is larger than the sum of its proper divisors (21891763).

18336666852017 is an equidigital number, since it uses as much as digits as its factorization.

18336666852017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21891762.

The product of its (nonzero) digits is 52254720, while the sum is 62.

The spelling of 18336666852017 in words is "eighteen trillion, three hundred thirty-six billion, six hundred sixty-six million, eight hundred fifty-two thousand, seventeen".