18227472 has 40 divisors (see below), whose sum is σ = 47244000. Its totient is φ = 6055680.

The previous prime is 18227449. The next prime is 18227483. The reversal of 18227472 is 27472281.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23572 + ... + 24332.

It is an arithmetic number, because the mean of its divisors is an integer number (1181100).

Almost surely, 2^18227472 is an apocalyptic number.

18227472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18227472 is an abundant number, since it is smaller than the sum of its proper divisors (29016528).

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

18227472 is a wasteful number, since it uses less digits than its factorization.

18227472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271 (or 1265 counting only the distinct ones).

The product of its digits is 12544, while the sum is 33.

The square root of 18227472 is about 4269.3643554984. The cubic root of 18227472 is about 263.1734941265.

The spelling of 18227472 in words is "eighteen million, two hundred twenty-seven thousand, four hundred seventy-two".