18016265 has 4 divisors (see below), whose sum is σ = 21619524. Its totient is φ = 14413008.

The previous prime is 18016249. The next prime is 18016267. The reversal of 18016265 is 56261081.

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 10601536 + 7414729 = 3256^2 + 2723^2 .

It is a cyclic number.

It is not a de Polignac number, because 18016265 - 2⁴ = 18016249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18016267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1801622 + ... + 1801631.

It is an arithmetic number, because the mean of its divisors is an integer number (5404881).

Almost surely, 2^18016265 is an apocalyptic number.

It is an amenable number.

18016265 is a deficient number, since it is larger than the sum of its proper divisors (3603259).

18016265 is an equidigital number, since it uses as much as digits as its factorization.

18016265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3603258.

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

The square root of 18016265 is about 4244.5571029261. The cubic root of 18016265 is about 262.1530533579.

It can be divided in two parts, 18016 and 265, that added together give a palindrome (18281).

The spelling of 18016265 in words is "eighteen million, sixteen thousand, two hundred sixty-five".