18230305 has 8 divisors (see below), whose sum is σ = 21907944. Its totient is φ = 14563200.

The previous prime is 18230297. The next prime is 18230309. The reversal of 18230305 is 50303281.

It can be written as a sum of positive squares in 4 ways, for example, as 388129 + 17842176 = 623^2 + 4224^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18230305 - 2³ = 18230297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18230309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1885 + ... + 6325.

It is an arithmetic number, because the mean of its divisors is an integer number (2738493).

Almost surely, 2^18230305 is an apocalyptic number.

It is an amenable number.

18230305 is a deficient number, since it is larger than the sum of its proper divisors (3677639).

18230305 is an equidigital number, since it uses as much as digits as its factorization.

18230305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5267.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 18230305 is about 4269.6961250187. The cubic root of 18230305 is about 263.1871279770.

Adding to 18230305 its reverse (50303281), we get a palindrome (68533586).

The spelling of 18230305 in words is "eighteen million, two hundred thirty thousand, three hundred five".