22004320 has 96 divisors (see below), whose sum is σ = 57153600. Its totient is φ = 7956480.

The previous prime is 22004303. The next prime is 22004321. The reversal of 22004320 is 2340022.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 22004320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22004321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147606 + ... + 147754.

It is an arithmetic number, because the mean of its divisors is an integer number (595350).

Almost surely, 2^22004320 is an apocalyptic number.

22004320 is a gapful number since it is divisible by the number (20) 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 22004320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28576800).

22004320 is an abundant number, since it is smaller than the sum of its proper divisors (35149280).

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

22004320 is a wasteful number, since it uses less digits than its factorization.

22004320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 22004320 is about 4690.8762507659. The cubic root of 22004320 is about 280.2222724863. Note that the first 4 decimals are identical.

Adding to 22004320 its reverse (2340022), we get a palindrome (24344342).

The spelling of 22004320 in words is "twenty-two million, four thousand, three hundred twenty".