18444132 has 96 divisors (see below), whose sum is σ = 56483840. Its totient is φ = 5093280.

The previous prime is 18444121. The next prime is 18444157. The reversal of 18444132 is 23144481.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 18444096 and 18444105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23043 + ... + 23829.

Almost surely, 2^18444132 is an apocalyptic number.

18444132 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 18444132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28241920).

18444132 is an abundant number, since it is smaller than the sum of its proper divisors (38039708).

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

18444132 is a wasteful number, since it uses less digits than its factorization.

18444132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838 (or 830 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 18444132 is about 4294.6631998330. The cubic root of 18444132 is about 264.2121229029.

The spelling of 18444132 in words is "eighteen million, four hundred forty-four thousand, one hundred thirty-two".