22202020 has 24 divisors (see below), whose sum is σ = 46731384. Its totient is φ = 8860416.

The previous prime is 22201999. The next prime is 22202021. The reversal of 22202020 is 2020222.

It can be written as a sum of positive squares in 4 ways, for example, as 876096 + 21325924 = 936^2 + 4618^2 .

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 = 22201988 and 22202006.

It is not an unprimeable number, because it can be changed into a prime (22202021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10144 + ... + 12136.

It is an arithmetic number, because the mean of its divisors is an integer number (1947141).

Almost surely, 2^22202020 is an apocalyptic number.

22202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22202020 is an abundant number, since it is smaller than the sum of its proper divisors (24529364).

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

22202020 is a wasteful number, since it uses less digits than its factorization.

22202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559 (or 2557 counting only the distinct ones).

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

The square root of 22202020 is about 4711.9019514417. The cubic root of 22202020 is about 281.0589998663.

Adding to 22202020 its reverse (2020222), we get a palindrome (24222242).

It can be divided in two parts, 2 and 2202020, that added together give a palindrome (2202022).

The spelling of 22202020 in words is "twenty-two million, two hundred two thousand, twenty".