22001000220 has 192 divisors, whose sum is σ = 74535552000. Its totient is φ = 5366414592.

The previous prime is 22001000209. The next prime is 22001000227. The reversal of 22001000220 is 2200010022.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001000227) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 260569 + ... + 334511.

It is an arithmetic number, because the mean of its divisors is an integer number (388206000).

Almost surely, 2^22001000220 is an apocalyptic number.

22001000220 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 22001000220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37267776000).

22001000220 is an abundant number, since it is smaller than the sum of its proper divisors (52534551780).

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

22001000220 is a wasteful number, since it uses less digits than its factorization.

22001000220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74009 (or 74001 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 22001000220 its reverse (2200010022), we get a palindrome (24201010242).

It can be divided in two parts, 220010002 and 20, that added together give a palindrome (220010022).

The spelling of 22001000220 in words is "twenty-two billion, one million, two hundred twenty", and thus it is an aban number.