22506432 has 112 divisors (see below), whose sum is σ = 65544192. Its totient is φ = 6773760.

The previous prime is 22506413. The next prime is 22506437. The reversal of 22506432 is 23460522.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22506437) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 177153 + ... + 177279.

It is an arithmetic number, because the mean of its divisors is an integer number (585216).

Almost surely, 2^22506432 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 22506432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32772096).

22506432 is an abundant number, since it is smaller than the sum of its proper divisors (43037760).

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

22506432 is a wasteful number, since it uses less digits than its factorization.

22506432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 22506432 is about 4744.0944341360. The cubic root of 22506432 is about 282.3377071846.

Adding to 22506432 its reverse (23460522), we get a palindrome (45966954).

The spelling of 22506432 in words is "twenty-two million, five hundred six thousand, four hundred thirty-two".