20022222220 has 144 divisors (see below), whose sum is σ = 57462779808. Its totient is φ = 5760599040.

The previous prime is 20022222163. The next prime is 20022222239. The reversal of 20022222220 is 2222222002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20022222194 and 20022222203.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 68704 + ... + 211576.

It is an arithmetic number, because the mean of its divisors is an integer number (399047082).

Almost surely, 2^20022222220 is an apocalyptic number.

20022222220 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 20022222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28731389904).

20022222220 is an abundant number, since it is smaller than the sum of its proper divisors (37440557588).

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

20022222220 is a wasteful number, since it uses less digits than its factorization.

20022222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142920 (or 142911 counting only the distinct ones).

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

Adding to 20022222220 its reverse (2222222002), we get a palindrome (22244444222).

It can be divided in two parts, 20022 and 222220, that added together give a palindrome (242242).

The spelling of 20022222220 in words is "twenty billion, twenty-two million, two hundred twenty-two thousand, two hundred twenty".