20204442220 has 24 divisors (see below), whose sum is σ = 42651479808. Its totient is φ = 8039462400.

The previous prime is 20204442133. The next prime is 20204442229. The reversal of 20204442220 is 2224440202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20204442191 and 20204442200.

It is not an unprimeable number, because it can be changed into a prime (20204442229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2640741 + ... + 2648380.

It is an arithmetic number, because the mean of its divisors is an integer number (1777144992).

Almost surely, 2^20204442220 is an apocalyptic number.

20204442220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20204442220 is an abundant number, since it is smaller than the sum of its proper divisors (22447037588).

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

20204442220 is a wasteful number, since it uses less digits than its factorization.

20204442220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5289321 (or 5289319 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 20204442220 its reverse (2224440202), we get a palindrome (22428882422).

The spelling of 20204442220 in words is "twenty billion, two hundred four million, four hundred forty-two thousand, two hundred twenty".