18885986334601 has 2 divisors, whose sum is σ = 18885986334602. Its totient is φ = 18885986334600.

The previous prime is 18885986334547. The next prime is 18885986334613. The reversal of 18885986334601 is 10643368958881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15739350271225 + 3146636063376 = 3967285^2 + 1773876^2 .

It is a cyclic number.

It is not a de Polignac number, because 18885986334601 - 2¹³ = 18885986326409 is a prime.

It is not a weakly prime, because it can be changed into another prime (18885986334671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9442993167300 + 9442993167301.

It is an arithmetic number, because the mean of its divisors is an integer number (9442993167301).

Almost surely, 2^{18885986334601} is an apocalyptic number.

It is an amenable number.

18885986334601 is a deficient number, since it is larger than the sum of its proper divisors (1).

18885986334601 is an equidigital number, since it uses as much as digits as its factorization.

18885986334601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 238878720, while the sum is 70.

The spelling of 18885986334601 in words is "eighteen trillion, eight hundred eighty-five billion, nine hundred eighty-six million, three hundred thirty-four thousand, six hundred one".