18388573045091 has 2 divisors, whose sum is σ = 18388573045092. Its totient is φ = 18388573045090.

The previous prime is 18388573045019. The next prime is 18388573045093. The reversal of 18388573045091 is 19054037588381.

Together with previous prime (18388573045019) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18388573045091 - 2³⁴ = 18371393175907 is a prime.

It is a Sophie Germain prime.

Together with 18388573045093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18388573045093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9194286522545 + 9194286522546.

It is an arithmetic number, because the mean of its divisors is an integer number (9194286522546).

Almost surely, 2^{18388573045091} is an apocalyptic number.

18388573045091 is a deficient number, since it is larger than the sum of its proper divisors (1).

18388573045091 is an equidigital number, since it uses as much as digits as its factorization.

18388573045091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29030400, while the sum is 62.

The spelling of 18388573045091 in words is "eighteen trillion, three hundred eighty-eight billion, five hundred seventy-three million, forty-five thousand, ninety-one".