18768716719 has 2 divisors, whose sum is σ = 18768716720. Its totient is φ = 18768716718.

The previous prime is 18768716713. The next prime is 18768716761. The reversal of 18768716719 is 91761786781.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18768716719 - 2³¹ = 16621233071 is a prime.

It is a super-2 number, since 2×18768716719² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18768716713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9384358359 + 9384358360.

It is an arithmetic number, because the mean of its divisors is an integer number (9384358360).

Almost surely, 2^18768716719 is an apocalyptic number.

18768716719 is a deficient number, since it is larger than the sum of its proper divisors (1).

18768716719 is an equidigital number, since it uses as much as digits as its factorization.

18768716719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7112448, while the sum is 61.

The spelling of 18768716719 in words is "eighteen billion, seven hundred sixty-eight million, seven hundred sixteen thousand, seven hundred nineteen".