18000265 has 4 divisors (see below), whose sum is σ = 21600324. Its totient is φ = 14400208.

The previous prime is 18000259. The next prime is 18000319. The reversal of 18000265 is 56200081.

It is a happy number.

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 14107536 + 3892729 = 3756^2 + 1973^2 .

It is a cyclic number.

It is not a de Polignac number, because 18000265 - 2⁷ = 18000137 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1800022 + ... + 1800031.

It is an arithmetic number, because the mean of its divisors is an integer number (5400081).

Almost surely, 2^18000265 is an apocalyptic number.

It is an amenable number.

18000265 is a deficient number, since it is larger than the sum of its proper divisors (3600059).

18000265 is an equidigital number, since it uses as much as digits as its factorization.

18000265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3600058.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 18000265 is about 4242.6719175538. The cubic root of 18000265 is about 262.0754255192.

The spelling of 18000265 in words is "eighteen million, two hundred sixty-five", and thus it is an aban number.