18351868700017 has 2 divisors, whose sum is σ = 18351868700018. Its totient is φ = 18351868700016.

The previous prime is 18351868699993. The next prime is 18351868700059. The reversal of 18351868700017 is 71000786815381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16419279389041 + 1932589310976 = 4052071^2 + 1390176^2 .

It is a cyclic number.

It is not a de Polignac number, because 18351868700017 - 2³⁵ = 18317508961649 is a prime.

It is not a weakly prime, because it can be changed into another prime (18351868700317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9175934350008 + 9175934350009.

It is an arithmetic number, because the mean of its divisors is an integer number (9175934350009).

Almost surely, 2^{18351868700017} is an apocalyptic number.

It is an amenable number.

18351868700017 is a deficient number, since it is larger than the sum of its proper divisors (1).

18351868700017 is an equidigital number, since it uses as much as digits as its factorization.

18351868700017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2257920, while the sum is 55.

The spelling of 18351868700017 in words is "eighteen trillion, three hundred fifty-one billion, eight hundred sixty-eight million, seven hundred thousand, seventeen".