20212202220 has 192 divisors, whose sum is σ = 66157572096. Its totient is φ = 4515413760.

The previous prime is 20212202201. The next prime is 20212202237. The reversal of 20212202220 is 2220221202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20212202220.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3683599 + ... + 3689081.

It is an arithmetic number, because the mean of its divisors is an integer number (344570688).

Almost surely, 2^20212202220 is an apocalyptic number.

20212202220 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 20212202220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33078786048).

20212202220 is an abundant number, since it is smaller than the sum of its proper divisors (45945369876).

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

20212202220 is a wasteful number, since it uses less digits than its factorization.

20212202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5700 (or 5698 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 20212202220 its reverse (2220221202), we get a palindrome (22432423422).

The spelling of 20212202220 in words is "twenty billion, two hundred twelve million, two hundred two thousand, two hundred twenty".