2020 is the **corona** year. 2020 is important in **mathematics** also.

It is an **even composite** number same as 2 × 2 × 5 × 101. Twelve **divisors** are 1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020 and their sum is 4284. As the sum of all proper divisors is 2264, greater than the number itself, hence it is an **abundant number**. Adding to 2020 its reverse, we get a **Palindrome** 2222! 2020 is the 22^{nd} natural number for which sum of the digits is equal to the number of digits.

We can write 2020 as the sum of consecutive numbers in three different ways:

2020 = 402 + 403 + 404 + 405 + 406 = 249 + 250 + … + 255 + 256 = 31 + 32 + 33 + … + 69 + 70

It can be written as the sum of squares in the following ways:

2020 = 24^{2 }+ 38^{2 }= 16^{2 }+ 42^{2} = 4^{2 }+ 6^{2 }+ 8^{2 }+ … + 20^{2 }+ 22^{2}

This number can be written as the sum of twenty consecutive **triangular numbers** as

2020 = t_{3 }+ t_{4 }+ t_{5 }+ … + t_{21 }+ t_{22}