18338005 has 36 divisors (see below), whose sum is σ = 26809380. Its totient is φ = 12004608.

The previous prime is 18337987. The next prime is 18338011. The reversal of 18338005 is 50083381.

It can be written as a sum of positive squares in 6 ways, for example, as 815409 + 17522596 = 903^2 + 4186^2 .

It is not a de Polignac number, because 18338005 - 2⁵ = 18337973 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 35 ways as a sum of consecutive naturals, for example, 206001 + ... + 206089.

It is an arithmetic number, because the mean of its divisors is an integer number (744705).

Almost surely, 2^18338005 is an apocalyptic number.

It is an amenable number.

18338005 is a deficient number, since it is larger than the sum of its proper divisors (8471375).

18338005 is an equidigital number, since it uses as much as digits as its factorization.

18338005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 18338005 is about 4282.2896912750. The cubic root of 18338005 is about 263.7043915357.

The spelling of 18338005 in words is "eighteen million, three hundred thirty-eight thousand, five".