18227244 has 24 divisors (see below), whose sum is σ = 48606208. Its totient is φ = 5207760.

The previous prime is 18227233. The next prime is 18227249. The reversal of 18227244 is 44272281.

It is not an unprimeable number, because it can be changed into a prime (18227249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108412 + ... + 108579.

Almost surely, 2^18227244 is an apocalyptic number.

18227244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18227244 is an abundant number, since it is smaller than the sum of its proper divisors (30378964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18227244 is a wasteful number, since it uses less digits than its factorization.

18227244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217005 (or 217003 counting only the distinct ones).

The product of its digits is 7168, while the sum is 30.

The square root of 18227244 is about 4269.3376535477. The cubic root of 18227244 is about 263.1723968120.

The spelling of 18227244 in words is "eighteen million, two hundred twenty-seven thousand, two hundred forty-four".