20020100220 has 216 divisors, whose sum is σ = 64696859136. Its totient is φ = 5008962816.

The previous prime is 20020100159. The next prime is 20020100227. The reversal of 20020100220 is 2200102002.

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 (20020100227) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5044677 + ... + 5048643.

It is an arithmetic number, because the mean of its divisors is an integer number (299522496).

Almost surely, 2^20020100220 is an apocalyptic number.

20020100220 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 20020100220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32348429568).

20020100220 is an abundant number, since it is smaller than the sum of its proper divisors (44676758916).

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

20020100220 is a wasteful number, since it uses less digits than its factorization.

20020100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4081 (or 4053 counting only the distinct ones).

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

Adding to 20020100220 its reverse (2200102002), we get a palindrome (22220202222).

The spelling of 20020100220 in words is "twenty billion, twenty million, one hundred thousand, two hundred twenty".