18768716713 has 2 divisors, whose sum is σ = 18768716714. Its totient is φ = 18768716712.

The previous prime is 18768716693. The next prime is 18768716719. The reversal of 18768716713 is 31761786781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18750372624 + 18344089 = 136932^2 + 4283^2 .

It is a cyclic number.

It is not a de Polignac number, because 18768716713 - 2¹³ = 18768708521 is a prime.

It is not a weakly prime, because it can be changed into another prime (18768716719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9384358356 + 9384358357.

It is an arithmetic number, because the mean of its divisors is an integer number (9384358357).

Almost surely, 2^18768716713 is an apocalyptic number.

It is an amenable number.

18768716713 is a deficient number, since it is larger than the sum of its proper divisors (1).

18768716713 is an equidigital number, since it uses as much as digits as its factorization.

18768716713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2370816, while the sum is 55.

The spelling of 18768716713 in words is "eighteen billion, seven hundred sixty-eight million, seven hundred sixteen thousand, seven hundred thirteen".