18186336013 has 2 divisors, whose sum is σ = 18186336014. Its totient is φ = 18186336012.

The previous prime is 18186335989. The next prime is 18186336019. The reversal of 18186336013 is 31063368181.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13013561929 + 5172774084 = 114077^2 + 71922^2 .

It is an emirp because it is prime and its reverse (31063368181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18186336013 - 2⁹ = 18186335501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18186336019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9093168006 + 9093168007.

It is an arithmetic number, because the mean of its divisors is an integer number (9093168007).

Almost surely, 2^18186336013 is an apocalyptic number.

It is an amenable number.

18186336013 is a deficient number, since it is larger than the sum of its proper divisors (1).

18186336013 is an equidigital number, since it uses as much as digits as its factorization.

18186336013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 18186336013 in words is "eighteen billion, one hundred eighty-six million, three hundred thirty-six thousand, thirteen".