18189377413 has 2 divisors, whose sum is σ = 18189377414. Its totient is φ = 18189377412.

The previous prime is 18189377383. The next prime is 18189377449. The reversal of 18189377413 is 31477398181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15972662689 + 2216714724 = 126383^2 + 47082^2 .

It is a cyclic number.

It is not a de Polignac number, because 18189377413 - 2¹³ = 18189369221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18189377113) 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, 9094688706 + 9094688707.

It is an arithmetic number, because the mean of its divisors is an integer number (9094688707).

Almost surely, 2^18189377413 is an apocalyptic number.

It is an amenable number.

18189377413 is a deficient number, since it is larger than the sum of its proper divisors (1).

18189377413 is an equidigital number, since it uses as much as digits as its factorization.

18189377413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 52.

The spelling of 18189377413 in words is "eighteen billion, one hundred eighty-nine million, three hundred seventy-seven thousand, four hundred thirteen".