18326272 has 36 divisors (see below), whose sum is σ = 38741976. Its totient is φ = 8622080.

The previous prime is 18326267. The next prime is 18326311. The reversal of 18326272 is 27262381.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2247 + ... + 6457.

It is an arithmetic number, because the mean of its divisors is an integer number (1076166).

Almost surely, 2^18326272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18326272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19370988).

18326272 is an abundant number, since it is smaller than the sum of its proper divisors (20415704).

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

18326272 is an equidigital number, since it uses as much as digits as its factorization.

18326272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4244 (or 4230 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 18326272 is about 4280.9195273913. The cubic root of 18326272 is about 263.6481385293.

The spelling of 18326272 in words is "eighteen million, three hundred twenty-six thousand, two hundred seventy-two".