22220002020 has 96 divisors (see below), whose sum is σ = 62922021120. Its totient is φ = 5858265600.

The previous prime is 22220002009. The next prime is 22220002033. The reversal of 22220002020 is 2020002222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 22220001987 and 22220002005.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5021529 + ... + 5025951.

It is an arithmetic number, because the mean of its divisors is an integer number (655437720).

Almost surely, 2^22220002020 is an apocalyptic number.

22220002020 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 22220002020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31461010560).

22220002020 is an abundant number, since it is smaller than the sum of its proper divisors (40702019100).

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

22220002020 is a wasteful number, since it uses less digits than its factorization.

22220002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5365 (or 5363 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

Adding to 22220002020 its reverse (2020002222), we get a palindrome (24240004242).

The spelling of 22220002020 in words is "twenty-two billion, two hundred twenty million, two thousand, twenty".