18443332 has 24 divisors (see below), whose sum is σ = 33840576. Its totient is φ = 8778528.

The previous prime is 18443329. The next prime is 18443339. The reversal of 18443332 is 23334481.

It is a self number, because there is not a number n which added to its sum of digits gives 18443332.

It is not an unprimeable number, because it can be changed into a prime (18443339) 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, 27918 + ... + 28570.

It is an arithmetic number, because the mean of its divisors is an integer number (1410024).

Almost surely, 2^18443332 is an apocalyptic number.

It is an amenable number.

18443332 is a deficient number, since it is larger than the sum of its proper divisors (15397244).

18443332 is a wasteful number, since it uses less digits than its factorization.

18443332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987 (or 985 counting only the distinct ones).

The product of its digits is 6912, while the sum is 28.

The square root of 18443332 is about 4294.5700599711. The cubic root of 18443332 is about 264.2083028487.

The spelling of 18443332 in words is "eighteen million, four hundred forty-three thousand, three hundred thirty-two".