18357719 has 2 divisors, whose sum is σ = 18357720. Its totient is φ = 18357718.

The previous prime is 18357697. The next prime is 18357721. The reversal of 18357719 is 91775381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18357719 - 2¹² = 18353623 is a prime.

It is a super-2 number, since 2×18357719² = 674011693765922, which contains 22 as substring.

Together with 18357721, 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 (18357419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9178859 + 9178860.

It is an arithmetic number, because the mean of its divisors is an integer number (9178860).

Almost surely, 2^18357719 is an apocalyptic number.

18357719 is a deficient number, since it is larger than the sum of its proper divisors (1).

18357719 is an equidigital number, since it uses as much as digits as its factorization.

18357719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 41.

The square root of 18357719 is about 4284.5908789522. The cubic root of 18357719 is about 263.7988548569.

The spelling of 18357719 in words is "eighteen million, three hundred fifty-seven thousand, seven hundred nineteen".