22120220 has 24 divisors (see below), whose sum is σ = 46569600. Its totient is φ = 8825792.

The previous prime is 22120193. The next prime is 22120223. The reversal of 22120220 is 2202122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120223) 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 7 ways as a sum of consecutive naturals, for example, 8426 + ... + 10734.

It is an arithmetic number, because the mean of its divisors is an integer number (1940400).

Almost surely, 2^22120220 is an apocalyptic number.

22120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22120220 is an abundant number, since it is smaller than the sum of its proper divisors (24449380).

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

22120220 is a wasteful number, since it uses less digits than its factorization.

22120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2797 (or 2795 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 22120220 is about 4703.2137948428. The cubic root of 22120220 is about 280.7134018938.

Adding to 22120220 its reverse (2202122), we get a palindrome (24322342).

The spelling of 22120220 in words is "twenty-two million, one hundred twenty thousand, two hundred twenty".