18244265 has 8 divisors (see below), whose sum is σ = 23577288. Its totient is φ = 13472640.

The previous prime is 18244253. The next prime is 18244279. The reversal of 18244265 is 56244281.

It can be written as a sum of positive squares in 4 ways, for example, as 1038361 + 17205904 = 1019^2 + 4148^2 .

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

It is not a de Polignac number, because 18244265 - 2¹⁰ = 18243241 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140276 + ... + 140405.

It is an arithmetic number, because the mean of its divisors is an integer number (2947161).

Almost surely, 2^18244265 is an apocalyptic number.

It is an amenable number.

18244265 is a deficient number, since it is larger than the sum of its proper divisors (5333023).

18244265 is a wasteful number, since it uses less digits than its factorization.

18244265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280699.

The product of its digits is 15360, while the sum is 32.

The square root of 18244265 is about 4271.3305889383. The cubic root of 18244265 is about 263.2542900438.

The spelling of 18244265 in words is "eighteen million, two hundred forty-four thousand, two hundred sixty-five".