18444032 has 18 divisors (see below), whose sum is σ = 36816528. Its totient is φ = 9221888.

The previous prime is 18444007. The next prime is 18444037. The reversal of 18444032 is 23044481.

It is a junction number, because it is equal to n+sod(n) for n = 18443992 and 18444010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18444037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35768 + ... + 36279.

Almost surely, 2^18444032 is an apocalyptic number.

It is an amenable number.

18444032 is a deficient number, since it is larger than the sum of its proper divisors (18372496).

18444032 is an frugal number, since it uses more digits than its factorization.

18444032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72063 (or 72049 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 18444032 is about 4294.6515574607. The cubic root of 18444032 is about 264.2116454022.

The spelling of 18444032 in words is "eighteen million, four hundred forty-four thousand, thirty-two".