18314393 has 2 divisors, whose sum is σ = 18314394. Its totient is φ = 18314392.

The previous prime is 18314377. The next prime is 18314407. The reversal of 18314393 is 39341381.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12730624 + 5583769 = 3568^2 + 2363^2 .

It is a cyclic number.

It is not a de Polignac number, because 18314393 - 2⁴ = 18314377 is a prime.

It is not a weakly prime, because it can be changed into another prime (18314323) 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, 9157196 + 9157197.

It is an arithmetic number, because the mean of its divisors is an integer number (9157197).

Almost surely, 2^18314393 is an apocalyptic number.

It is an amenable number.

18314393 is a deficient number, since it is larger than the sum of its proper divisors (1).

18314393 is an equidigital number, since it uses as much as digits as its factorization.

18314393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The square root of 18314393 is about 4279.5318669219. The cubic root of 18314393 is about 263.5911610715.

The spelling of 18314393 in words is "eighteen million, three hundred fourteen thousand, three hundred ninety-three".