18704339 has 2 divisors, whose sum is σ = 18704340. Its totient is φ = 18704338.

The previous prime is 18704327. The next prime is 18704353. The reversal of 18704339 is 93340781.

It is a weak prime.

It is an emirp because it is prime and its reverse (93340781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18704339 - 2¹² = 18700243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18704299 and 18704308.

It is not a weakly prime, because it can be changed into another prime (18704639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9352169 + 9352170.

It is an arithmetic number, because the mean of its divisors is an integer number (9352170).

Almost surely, 2^18704339 is an apocalyptic number.

18704339 is a deficient number, since it is larger than the sum of its proper divisors (1).

18704339 is an equidigital number, since it uses as much as digits as its factorization.

18704339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 18704339 is about 4324.8513269244. The cubic root of 18704339 is about 265.4488134328.

The spelling of 18704339 in words is "eighteen million, seven hundred four thousand, three hundred thirty-nine".