18166510895933 has 2 divisors, whose sum is σ = 18166510895934. Its totient is φ = 18166510895932.

The previous prime is 18166510895867. The next prime is 18166510895971. The reversal of 18166510895933 is 33959801566181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9184130264089 + 8982380631844 = 3030533^2 + 2997062^2 .

It is a cyclic number.

It is not a de Polignac number, because 18166510895933 - 2²⁸ = 18166242460477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18166510895933.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18166510897933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9083255447966 + 9083255447967.

It is an arithmetic number, because the mean of its divisors is an integer number (9083255447967).

Almost surely, 2^{18166510895933} is an apocalyptic number.

It is an amenable number.

18166510895933 is a deficient number, since it is larger than the sum of its proper divisors (1).

18166510895933 is an equidigital number, since it uses as much as digits as its factorization.

18166510895933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41990400, while the sum is 65.

The spelling of 18166510895933 in words is "eighteen trillion, one hundred sixty-six billion, five hundred ten million, eight hundred ninety-five thousand, nine hundred thirty-three".