18316439 has 2 divisors, whose sum is σ = 18316440. Its totient is φ = 18316438.

The previous prime is 18316427. The next prime is 18316453. The reversal of 18316439 is 93461381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18316439 - 2⁸ = 18316183 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18316399 and 18316408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18316499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9158219 + 9158220.

It is an arithmetic number, because the mean of its divisors is an integer number (9158220).

Almost surely, 2^18316439 is an apocalyptic number.

18316439 is a deficient number, since it is larger than the sum of its proper divisors (1).

18316439 is an equidigital number, since it uses as much as digits as its factorization.

18316439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 18316439 is about 4279.7709050836. The cubic root of 18316439 is about 263.6009764379.

The spelling of 18316439 in words is "eighteen million, three hundred sixteen thousand, four hundred thirty-nine".