20222020 has 96 divisors (see below), whose sum is σ = 53738496. Its totient is φ = 6220800.

The previous prime is 20222011. The next prime is 20222021. The reversal of 20222020 is 2022202.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20221988 and 20222006.

It is not an unprimeable number, because it can be changed into a prime (20222021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74485 + ... + 74755.

It is an arithmetic number, because the mean of its divisors is an integer number (559776).

Almost surely, 2^20222020 is an apocalyptic number.

20222020 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 20222020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26869248).

20222020 is an abundant number, since it is smaller than the sum of its proper divisors (33516476).

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

20222020 is a wasteful number, since it uses less digits than its factorization.

20222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 20222020 is about 4496.8900364585. The cubic root of 20222020 is about 272.4424927044.

20222020 divided by its sum of digits (10) gives a palindrome (2022202).

Adding to 20222020 its reverse (2022202), we get a palindrome (22244222).

It can be divided in two parts, 202 and 22020, that added together give a palindrome (22222).

The spelling of 20222020 in words is "twenty million, two hundred twenty-two thousand, twenty".