22222042220 has 96 divisors (see below), whose sum is σ = 54043790976. Its totient is φ = 7517952000.

The previous prime is 22222042217. The next prime is 22222042229. The reversal of 22222042220 is 2224022222.

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 = 22222042192 and 22222042201.

It is not an unprimeable number, because it can be changed into a prime (22222042229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4423310 + ... + 4428330.

It is an arithmetic number, because the mean of its divisors is an integer number (562956156).

Almost surely, 2^22222042220 is an apocalyptic number.

22222042220 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 22222042220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27021895488).

22222042220 is an abundant number, since it is smaller than the sum of its proper divisors (31821748756).

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

22222042220 is a wasteful number, since it uses less digits than its factorization.

22222042220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5451 (or 5449 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 22222042220 its reverse (2224022222), we get a palindrome (24446064442).

The spelling of 22222042220 in words is "twenty-two billion, two hundred twenty-two million, forty-two thousand, two hundred twenty".