22508120 has 16 divisors (see below), whose sum is σ = 50643360. Its totient is φ = 9003232.

The previous prime is 22508117. The next prime is 22508137. The reversal of 22508120 is 2180522.

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

It is a junction number, because it is equal to n+sod(n) for n = 22508092 and 22508101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281312 + ... + 281391.

It is an arithmetic number, because the mean of its divisors is an integer number (3165210).

Almost surely, 2^22508120 is an apocalyptic number.

22508120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22508120 is an abundant number, since it is smaller than the sum of its proper divisors (28135240).

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

22508120 is a wasteful number, since it uses less digits than its factorization.

22508120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562714 (or 562710 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 22508120 is about 4744.2723361966. The cubic root of 22508120 is about 282.3447655244.

Adding to 22508120 its reverse (2180522), we get a palindrome (24688642).

The spelling of 22508120 in words is "twenty-two million, five hundred eight thousand, one hundred twenty".