18244223 has 4 divisors (see below), whose sum is σ = 18253440. Its totient is φ = 18235008.

The previous prime is 18244211. The next prime is 18244229. The reversal of 18244223 is 32244281.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18244223 - 2²⁴ = 1467007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18244192 and 18244201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18244229) 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, 290 + ... + 6047.

It is an arithmetic number, because the mean of its divisors is an integer number (4563360).

Almost surely, 2^18244223 is an apocalyptic number.

18244223 is a deficient number, since it is larger than the sum of its proper divisors (9217).

18244223 is an equidigital number, since it uses as much as digits as its factorization.

18244223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9216.

The product of its digits is 3072, while the sum is 26.

The square root of 18244223 is about 4271.3256724347. The cubic root of 18244223 is about 263.2540880316.

The spelling of 18244223 in words is "eighteen million, two hundred forty-four thousand, two hundred twenty-three".