18200210221169 has 2 divisors, whose sum is σ = 18200210221170. Its totient is φ = 18200210221168.

The previous prime is 18200210221111. The next prime is 18200210221229. The reversal of 18200210221169 is 96112201200281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18139822073569 + 60388147600 = 4259087^2 + 245740^2 .

It is a cyclic number.

It is not a de Polignac number, because 18200210221169 - 2²⁸ = 18199941785713 is a prime.

It is a super-2 number, since 2×18200210221169² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18200210221469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9100105110584 + 9100105110585.

It is an arithmetic number, because the mean of its divisors is an integer number (9100105110585).

Almost surely, 2^{18200210221169} is an apocalyptic number.

It is an amenable number.

18200210221169 is a deficient number, since it is larger than the sum of its proper divisors (1).

18200210221169 is an equidigital number, since it uses as much as digits as its factorization.

18200210221169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 35.

The spelling of 18200210221169 in words is "eighteen trillion, two hundred billion, two hundred ten million, two hundred twenty-one thousand, one hundred sixty-nine".