18343719 has 32 divisors (see below), whose sum is σ = 28723200. Its totient is φ = 11547360.

The previous prime is 18343711. The next prime is 18343733. The reversal of 18343719 is 91734381.

It is a happy number.

It is not a de Polignac number, because 18343719 - 2³ = 18343711 is a prime.

It is a super-2 number, since 2×18343719² = 672984053501922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18343711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67554 + ... + 67824.

It is an arithmetic number, because the mean of its divisors is an integer number (897600).

Almost surely, 2^18343719 is an apocalyptic number.

18343719 is a deficient number, since it is larger than the sum of its proper divisors (10379481).

18343719 is a wasteful number, since it uses less digits than its factorization.

18343719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412 (or 406 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 18343719 is about 4282.9568057593. The cubic root of 18343719 is about 263.7317782010.

The spelling of 18343719 in words is "eighteen million, three hundred forty-three thousand, seven hundred nineteen".