18338105 has 4 divisors (see below), whose sum is σ = 22005732. Its totient is φ = 14670480.

The previous prime is 18338083. The next prime is 18338113. The reversal of 18338105 is 50183381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14160169 + 4177936 = 3763^2 + 2044^2 .

It is not a de Polignac number, because 18338105 - 2¹² = 18334009 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 1833806 + ... + 1833815.

It is an arithmetic number, because the mean of its divisors is an integer number (5501433).

Almost surely, 2^18338105 is an apocalyptic number.

It is an amenable number.

18338105 is a deficient number, since it is larger than the sum of its proper divisors (3667627).

18338105 is an equidigital number, since it uses as much as digits as its factorization.

18338105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3667626.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 18338105 is about 4282.3013672557. The cubic root of 18338105 is about 263.7048708752.

The spelling of 18338105 in words is "eighteen million, three hundred thirty-eight thousand, one hundred five".