2081222020 has 48 divisors (see below), whose sum is σ = 4494132720. Its totient is φ = 809243136.

The previous prime is 2081221963. The next prime is 2081222027. The reversal of 2081222020 is 202221802.

It can be written as a sum of positive squares in 8 ways, for example, as 319908996 + 1761313024 = 17886^2 + 41968^2 .

It is not an unprimeable number, because it can be changed into a prime (2081222027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106534 + ... + 124546.

It is an arithmetic number, because the mean of its divisors is an integer number (93627765).

Almost surely, 2^2081222020 is an apocalyptic number.

2081222020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2081222020 is an abundant number, since it is smaller than the sum of its proper divisors (2412910700).

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

2081222020 is a wasteful number, since it uses less digits than its factorization.

2081222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18184 (or 18182 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 2081222020 is about 45620.4123172950. The cubic root of 2081222020 is about 1276.7507963414.

Adding to 2081222020 its reverse (202221802), we get a palindrome (2283443822).

The spelling of 2081222020 in words is "two billion, eighty-one million, two hundred twenty-two thousand, twenty".