18242178060317 has 2 divisors, whose sum is σ = 18242178060318. Its totient is φ = 18242178060316.

The previous prime is 18242178060287. The next prime is 18242178060361. The reversal of 18242178060317 is 71306087124281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15633649431481 + 2608528628836 = 3953941^2 + 1615094^2 .

It is a cyclic number.

It is not a de Polignac number, because 18242178060317 - 2²⁰ = 18242177011741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18242178060367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9121089030158 + 9121089030159.

It is an arithmetic number, because the mean of its divisors is an integer number (9121089030159).

Almost surely, 2^{18242178060317} is an apocalyptic number.

It is an amenable number.

18242178060317 is a deficient number, since it is larger than the sum of its proper divisors (1).

18242178060317 is an equidigital number, since it uses as much as digits as its factorization.

18242178060317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 903168, while the sum is 50.

The spelling of 18242178060317 in words is "eighteen trillion, two hundred forty-two billion, one hundred seventy-eight million, sixty thousand, three hundred seventeen".