22103220 has 48 divisors (see below), whose sum is σ = 64028160. Its totient is φ = 5690496.

The previous prime is 22103219. The next prime is 22103227. The reversal of 22103220 is 2230122.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 22103196 and 22103205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22103227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4612 + ... + 8091.

It is an arithmetic number, because the mean of its divisors is an integer number (1333920).

Almost surely, 2^22103220 is an apocalyptic number.

22103220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22103220 is an abundant number, since it is smaller than the sum of its proper divisors (41924940).

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

22103220 is a wasteful number, since it uses less digits than its factorization.

22103220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12744 (or 12742 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 22103220 is about 4701.4061726254. The cubic root of 22103220 is about 280.6414714630.

Adding to 22103220 its reverse (2230122), we get a palindrome (24333342).

The spelling of 22103220 in words is "twenty-two million, one hundred three thousand, two hundred twenty".