22220022220 has 72 divisors (see below), whose sum is σ = 51418234224. Its totient is φ = 7999200000.

The previous prime is 22220022211. The next prime is 22220022221. The reversal of 22220022220 is 2222002222.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22220022194 and 22220022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220022221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2239270 + ... + 2249170.

It is an arithmetic number, because the mean of its divisors is an integer number (714142142).

Almost surely, 2^22220022220 is an apocalyptic number.

22220022220 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 22220022220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25709117112).

22220022220 is an abundant number, since it is smaller than the sum of its proper divisors (29198212004).

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

22220022220 is a wasteful number, since it uses less digits than its factorization.

22220022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10123 (or 10020 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 22220022220 its reverse (2222002222), we get a palindrome (24442024442).

It can be divided in two parts, 2222002 and 2220, that added together give a palindrome (2224222).

The spelling of 22220022220 in words is "twenty-two billion, two hundred twenty million, twenty-two thousand, two hundred twenty".