16718365919 has 2 divisors, whose sum is σ = 16718365920. Its totient is φ = 16718365918.

The previous prime is 16718365897. The next prime is 16718365921. The reversal of 16718365919 is 91956381761.

It is a strong prime.

It is an emirp because it is prime and its reverse (91956381761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16718365919 - 2⁸ = 16718365663 is a prime.

It is a super-2 number, since 2×16718365919² (a number of 21 digits) contains 22 as substring.

Together with 16718365921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16718365969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8359182959 + 8359182960.

It is an arithmetic number, because the mean of its divisors is an integer number (8359182960).

Almost surely, 2^16718365919 is an apocalyptic number.

16718365919 is a deficient number, since it is larger than the sum of its proper divisors (1).

16718365919 is an equidigital number, since it uses as much as digits as its factorization.

16718365919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 56.

The spelling of 16718365919 in words is "sixteen billion, seven hundred eighteen million, three hundred sixty-five thousand, nine hundred nineteen".