22032220 has 48 divisors (see below), whose sum is σ = 53178048. Its totient is φ = 7511040.

The previous prime is 22032169. The next prime is 22032233. The reversal of 22032220 is 2223022.

It is a self number, because there is not a number n which added to its sum of digits gives 22032220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33414 + ... + 34066.

It is an arithmetic number, because the mean of its divisors is an integer number (1107876).

Almost surely, 2^22032220 is an apocalyptic number.

22032220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22032220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26589024).

22032220 is an abundant number, since it is smaller than the sum of its proper divisors (31145828).

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

22032220 is a wasteful number, since it uses less digits than its factorization.

22032220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910 (or 908 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 22032220 is about 4693.8491667287. The cubic root of 22032220 is about 280.3406568067.

Adding to 22032220 its reverse (2223022), we get a palindrome (24255242).

The spelling of 22032220 in words is "twenty-two million, thirty-two thousand, two hundred twenty".