18272832 has 56 divisors (see below), whose sum is σ = 50901600. Its totient is φ = 5769216.

The previous prime is 18272809. The next prime is 18272867. The reversal of 18272832 is 23827281.

It is a junction number, because it is equal to n+sod(n) for n = 18272793 and 18272802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1144 + ... + 6152.

Almost surely, 2^18272832 is an apocalyptic number.

18272832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18272832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25450800).

18272832 is an abundant number, since it is smaller than the sum of its proper divisors (32628768).

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

18272832 is a wasteful number, since it uses less digits than its factorization.

18272832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5043 (or 5033 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 18272832 is about 4274.6733208515. The cubic root of 18272832 is about 263.3916202049.

The spelling of 18272832 in words is "eighteen million, two hundred seventy-two thousand, eight hundred thirty-two".