20321222020 has 96 divisors (see below), whose sum is σ = 46985702400. Its totient is φ = 7321353600.

The previous prime is 20321222011. The next prime is 20321222023. The reversal of 20321222020 is 2022212302.

It is a super-2 number, since 2×20321222020² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20321221985 and 20321222003.

It is not an unprimeable number, because it can be changed into a prime (20321222023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13034001 + ... + 13035559.

It is an arithmetic number, because the mean of its divisors is an integer number (489434400).

Almost surely, 2^20321222020 is an apocalyptic number.

20321222020 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 20321222020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23492851200).

20321222020 is an abundant number, since it is smaller than the sum of its proper divisors (26664480380).

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

20321222020 is a wasteful number, since it uses less digits than its factorization.

20321222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2089 (or 2087 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 20321222020 its reverse (2022212302), we get a palindrome (22343434322).

The spelling of 20321222020 in words is "twenty billion, three hundred twenty-one million, two hundred twenty-two thousand, twenty".