18068344913 has 2 divisors, whose sum is σ = 18068344914. Its totient is φ = 18068344912.

The previous prime is 18068344867. The next prime is 18068344951. The reversal of 18068344913 is 31944386081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15630750529 + 2437594384 = 125023^2 + 49372^2 .

It is an emirp because it is prime and its reverse (31944386081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18068344913 - 2⁶ = 18068344849 is a prime.

It is not a weakly prime, because it can be changed into another prime (18068344963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9034172456 + 9034172457.

It is an arithmetic number, because the mean of its divisors is an integer number (9034172457).

Almost surely, 2^18068344913 is an apocalyptic number.

It is an amenable number.

18068344913 is a deficient number, since it is larger than the sum of its proper divisors (1).

18068344913 is an equidigital number, since it uses as much as digits as its factorization.

18068344913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 18068344913 in words is "eighteen billion, sixty-eight million, three hundred forty-four thousand, nine hundred thirteen".