22130320 has 20 divisors (see below), whose sum is σ = 51453180. Its totient is φ = 8852096.

The previous prime is 22130293. The next prime is 22130321. The reversal of 22130320 is 2303122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8202496 + 13927824 = 2864^2 + 3732^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 22130320.

It is not an unprimeable number, because it can be changed into a prime (22130321) 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 3 ways as a sum of consecutive naturals, for example, 138235 + ... + 138394.

It is an arithmetic number, because the mean of its divisors is an integer number (2572659).

Almost surely, 2^22130320 is an apocalyptic number.

22130320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22130320 is an abundant number, since it is smaller than the sum of its proper divisors (29322860).

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

22130320 is a wasteful number, since it uses less digits than its factorization.

22130320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276642 (or 276636 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 22130320 is about 4704.2874061860. The cubic root of 22130320 is about 280.7561195816.

Adding to 22130320 its reverse (2303122), we get a palindrome (24433442).

The spelling of 22130320 in words is "twenty-two million, one hundred thirty thousand, three hundred twenty".