22520360 has 16 divisors (see below), whose sum is σ = 50670900. Its totient is φ = 9008128.

The previous prime is 22520321. The next prime is 22520387. The reversal of 22520360 is 6302522.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21548164 + 972196 = 4642^2 + 986^2 .

It is a super-2 number, since 2×22520360² = 1014333229059200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

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, 281465 + ... + 281544.

Almost surely, 2^22520360 is an apocalyptic number.

22520360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22520360 is an abundant number, since it is smaller than the sum of its proper divisors (28150540).

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

22520360 is a wasteful number, since it uses less digits than its factorization.

22520360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563020 (or 563016 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 22520360 is about 4745.5621374080. The cubic root of 22520360 is about 282.3959362971.

Adding to 22520360 its reverse (6302522), we get a palindrome (28822882).

The spelling of 22520360 in words is "twenty-two million, five hundred twenty thousand, three hundred sixty".