18716020487719 has 2 divisors, whose sum is σ = 18716020487720. Its totient is φ = 18716020487718.

The previous prime is 18716020487713. The next prime is 18716020487741. The reversal of 18716020487719 is 91778402061781.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18716020487719 is a prime.

It is a super-2 number, since 2×18716020487719² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18716020487713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9358010243859 + 9358010243860.

It is an arithmetic number, because the mean of its divisors is an integer number (9358010243860).

Almost surely, 2^{18716020487719} is an apocalyptic number.

18716020487719 is a deficient number, since it is larger than the sum of its proper divisors (1).

18716020487719 is an equidigital number, since it uses as much as digits as its factorization.

18716020487719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9483264, while the sum is 61.

The spelling of 18716020487719 in words is "eighteen trillion, seven hundred sixteen billion, twenty million, four hundred eighty-seven thousand, seven hundred nineteen".