18112041775021 has 2 divisors, whose sum is σ = 18112041775022. Its totient is φ = 18112041775020.

The previous prime is 18112041774961. The next prime is 18112041775063. The reversal of 18112041775021 is 12057714021181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12414248904996 + 5697792870025 = 3523386^2 + 2387005^2 .

It is a cyclic number.

It is not a de Polignac number, because 18112041775021 - 2²⁹ = 18111504904109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18112041776021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9056020887510 + 9056020887511.

It is an arithmetic number, because the mean of its divisors is an integer number (9056020887511).

Almost surely, 2^{18112041775021} is an apocalyptic number.

It is an amenable number.

18112041775021 is a deficient number, since it is larger than the sum of its proper divisors (1).

18112041775021 is an equidigital number, since it uses as much as digits as its factorization.

18112041775021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31360, while the sum is 40.

The spelling of 18112041775021 in words is "eighteen trillion, one hundred twelve billion, forty-one million, seven hundred seventy-five thousand, twenty-one".