22044 has 24 divisors (see below), whose sum is σ = 56448. Its totient is φ = 6640.

The previous prime is 22039. The next prime is 22051. The reversal of 22044 is 44022.

Added to its reverse (44022) it gives a triangular number (66066 = T₃₆₃).

22044 = T₇ + T₈ + ... + T₅₀.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

22044 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49 + ... + 215.

It is an arithmetic number, because the mean of its divisors is an integer number (2352).

2²²⁰⁴⁴ 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 22044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28224).

22044 is an abundant number, since it is smaller than the sum of its proper divisors (34404).

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

22044 is a wasteful number, since it uses less digits than its factorization.

22044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 22044 is about 148.4722196237. The cubic root of 22044 is about 28.0390611291.

Adding to 22044 its reverse (44022), we get a palindrome (66066).

The spelling of 22044 in words is "twenty-two thousand, forty-four", and thus it is an iban number.