18013388189189 has 2 divisors, whose sum is σ = 18013388189190. Its totient is φ = 18013388189188.

The previous prime is 18013388189177. The next prime is 18013388189213. The reversal of 18013388189189 is 98198188331081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9180039500164 + 8833348689025 = 3029858^2 + 2972095^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18013388189189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18013388182189) 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, 9006694094594 + 9006694094595.

It is an arithmetic number, because the mean of its divisors is an integer number (9006694094595).

Almost surely, 2^{18013388189189} is an apocalyptic number.

It is an amenable number.

18013388189189 is a deficient number, since it is larger than the sum of its proper divisors (1).

18013388189189 is an equidigital number, since it uses as much as digits as its factorization.

18013388189189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23887872, while the sum is 68.

The spelling of 18013388189189 in words is "eighteen trillion, thirteen billion, three hundred eighty-eight million, one hundred eighty-nine thousand, one hundred eighty-nine".