20422444204420 has 24 divisors (see below), whose sum is σ = 42889454212248. Its totient is φ = 8168535513600.

The previous prime is 20422444204403. The next prime is 20422444204429. The reversal of 20422444204420 is 2440244422402.

It can be written as a sum of positive squares in 4 ways, for example, as 13619288346624 + 6803155857796 = 3690432^2 + 2608286^2 .

It is not an unprimeable number, because it can be changed into a prime (20422444204429) 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, 27256651 + ... + 27995890.

It is an arithmetic number, because the mean of its divisors is an integer number (1787060592177).

Almost surely, 2^{20422444204420} is an apocalyptic number.

20422444204420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20422444204420 is an abundant number, since it is smaller than the sum of its proper divisors (22467010007828).

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

20422444204420 is a wasteful number, since it uses less digits than its factorization.

20422444204420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55271031 (or 55271029 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 34.

Adding to 20422444204420 its reverse (2440244422402), we get a palindrome (22862688626822).

The spelling of 20422444204420 in words is "twenty trillion, four hundred twenty-two billion, four hundred forty-four million, two hundred four thousand, four hundred twenty".