18256386228293 has 2 divisors, whose sum is σ = 18256386228294. Its totient is φ = 18256386228292.

The previous prime is 18256386228251. The next prime is 18256386228317. The reversal of 18256386228293 is 39282268365281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16098727831684 + 2157658396609 = 4012322^2 + 1468897^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18256386228293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18256386228193) 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, 9128193114146 + 9128193114147.

It is an arithmetic number, because the mean of its divisors is an integer number (9128193114147).

Almost surely, 2^{18256386228293} is an apocalyptic number.

It is an amenable number.

18256386228293 is a deficient number, since it is larger than the sum of its proper divisors (1).

18256386228293 is an equidigital number, since it uses as much as digits as its factorization.

18256386228293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 119439360, while the sum is 65.

The spelling of 18256386228293 in words is "eighteen trillion, two hundred fifty-six billion, three hundred eighty-six million, two hundred twenty-eight thousand, two hundred ninety-three".