22645320 has 32 divisors (see below), whose sum is σ = 67936320. Its totient is φ = 6038720.

The previous prime is 22645307. The next prime is 22645327. The reversal of 22645320 is 2354622.

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

It is not an unprimeable number, because it can be changed into a prime (22645327) 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, 94236 + ... + 94475.

It is an arithmetic number, because the mean of its divisors is an integer number (2123010).

Almost surely, 2^22645320 is an apocalyptic number.

22645320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22645320 is an abundant number, since it is smaller than the sum of its proper divisors (45291000).

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

22645320 is a wasteful number, since it uses less digits than its factorization.

22645320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188725 (or 188721 counting only the distinct ones).

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

The square root of 22645320 is about 4758.7099092086. The cubic root of 22645320 is about 282.9172886514.

Adding to 22645320 its reverse (2354622), we get a palindrome (24999942).

The spelling of 22645320 in words is "twenty-two million, six hundred forty-five thousand, three hundred twenty".