22523320 has 32 divisors (see below), whose sum is σ = 50893920. Its totient is φ = 8970880.

The previous prime is 22523299. The next prime is 22523321. The reversal of 22523320 is 2332522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22523321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9450 + ... + 11590.

It is an arithmetic number, because the mean of its divisors is an integer number (1590435).

Almost surely, 2^22523320 is an apocalyptic number.

22523320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22523320 is an abundant number, since it is smaller than the sum of its proper divisors (28370600).

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

22523320 is a wasteful number, since it uses less digits than its factorization.

22523320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2415 (or 2411 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 22523320 is about 4745.8739974846. The cubic root of 22523320 is about 282.4083081442.

Adding to 22523320 its reverse (2332522), we get a palindrome (24855842).

The spelling of 22523320 in words is "twenty-two million, five hundred twenty-three thousand, three hundred twenty".