22505320 has 16 divisors (see below), whose sum is σ = 50637060. Its totient is φ = 9002112.

The previous prime is 22505317. The next prime is 22505333. The reversal of 22505320 is 2350522.

It can be written as a sum of positive squares in 2 ways, for example, as 21325924 + 1179396 = 4618^2 + 1086^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281277 + ... + 281356.

Almost surely, 2^22505320 is an apocalyptic number.

22505320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22505320 is an abundant number, since it is smaller than the sum of its proper divisors (28131740).

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

22505320 is a wasteful number, since it uses less digits than its factorization.

22505320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562644 (or 562640 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 22505320 is about 4743.9772343467. The cubic root of 22505320 is about 282.3330571850. Note that the first 3 decimals are identical.

Adding to 22505320 its reverse (2350522), we get a palindrome (24855842).

The spelling of 22505320 in words is "twenty-two million, five hundred five thousand, three hundred twenty".