18318094522571 has 2 divisors, whose sum is σ = 18318094522572. Its totient is φ = 18318094522570.

The previous prime is 18318094522529. The next prime is 18318094522573. The reversal of 18318094522571 is 17522549081381.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18318094522571 is a prime.

It is a Sophie Germain prime.

Together with 18318094522573, 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 (18318094522573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9159047261285 + 9159047261286.

It is an arithmetic number, because the mean of its divisors is an integer number (9159047261286).

Almost surely, 2^{18318094522571} is an apocalyptic number.

18318094522571 is a deficient number, since it is larger than the sum of its proper divisors (1).

18318094522571 is an equidigital number, since it uses as much as digits as its factorization.

18318094522571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4838400, while the sum is 56.

The spelling of 18318094522571 in words is "eighteen trillion, three hundred eighteen billion, ninety-four million, five hundred twenty-two thousand, five hundred seventy-one".