18244297 has 4 divisors (see below), whose sum is σ = 18290196. Its totient is φ = 18198400.

The previous prime is 18244279. The next prime is 18244333. The reversal of 18244297 is 79244281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79244281 = 971 ⋅81611.

It can be written as a sum of positive squares in 2 ways, for example, as 11999296 + 6245001 = 3464^2 + 2499^2 .

It is a cyclic number.

It is not a de Polignac number, because 18244297 - 2¹¹ = 18242249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18244397) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 22348 + ... + 23149.

It is an arithmetic number, because the mean of its divisors is an integer number (4572549).

Almost surely, 2^18244297 is an apocalyptic number.

It is an amenable number.

18244297 is a deficient number, since it is larger than the sum of its proper divisors (45899).

18244297 is an equidigital number, since it uses as much as digits as its factorization.

18244297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45898.

The product of its digits is 32256, while the sum is 37.

The square root of 18244297 is about 4271.3343348420. The cubic root of 18244297 is about 263.2544439576.

The spelling of 18244297 in words is "eighteen million, two hundred forty-four thousand, two hundred ninety-seven".