18493339 has 2 divisors, whose sum is σ = 18493340. Its totient is φ = 18493338.

The previous prime is 18493333. The next prime is 18493369. The reversal of 18493339 is 93339481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18493339 - 2⁹ = 18492827 is a prime.

It is not a weakly prime, because it can be changed into another prime (18493333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9246669 + 9246670.

It is an arithmetic number, because the mean of its divisors is an integer number (9246670).

Almost surely, 2^18493339 is an apocalyptic number.

18493339 is a deficient number, since it is larger than the sum of its proper divisors (1).

18493339 is an equidigital number, since it uses as much as digits as its factorization.

18493339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 40.

The square root of 18493339 is about 4300.3882382873. The cubic root of 18493339 is about 264.4468776241.

The spelling of 18493339 in words is "eighteen million, four hundred ninety-three thousand, three hundred thirty-nine".