18380339 has 2 divisors, whose sum is σ = 18380340. Its totient is φ = 18380338.

The previous prime is 18380309. The next prime is 18380389. The reversal of 18380339 is 93308381.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18380339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18380299 and 18380308.

It is not a weakly prime, because it can be changed into another prime (18380309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9190169 + 9190170.

It is an arithmetic number, because the mean of its divisors is an integer number (9190170).

Almost surely, 2^18380339 is an apocalyptic number.

18380339 is a deficient number, since it is larger than the sum of its proper divisors (1).

18380339 is an equidigital number, since it uses as much as digits as its factorization.

18380339 is an evil number, because the sum of its binary digits is even.

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

The square root of 18380339 is about 4287.2297582472. The cubic root of 18380339 is about 263.9071595418.

The spelling of 18380339 in words is "eighteen million, three hundred eighty thousand, three hundred thirty-nine".