18116719 has 2 divisors, whose sum is σ = 18116720. Its totient is φ = 18116718.

The previous prime is 18116687. The next prime is 18116723. The reversal of 18116719 is 91761181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18116719 - 2⁵ = 18116687 is a prime.

It is a super-2 number, since 2×18116719² = 656431014649922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18116729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9058359 + 9058360.

It is an arithmetic number, because the mean of its divisors is an integer number (9058360).

Almost surely, 2^18116719 is an apocalyptic number.

18116719 is a deficient number, since it is larger than the sum of its proper divisors (1).

18116719 is an equidigital number, since it uses as much as digits as its factorization.

18116719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 34.

The square root of 18116719 is about 4256.3739262429. The cubic root of 18116719 is about 262.6393829686.

It can be divided in two parts, 181 and 16719, that added together give a square (16900 = 130²).

The spelling of 18116719 in words is "eighteen million, one hundred sixteen thousand, seven hundred nineteen".