20322404324020 has 72 divisors (see below), whose sum is σ = 45045637232904. Its totient is φ = 7700402045952.

The previous prime is 20322404324009. The next prime is 20322404324069. The reversal of 20322404324020 is 2042340422302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8256910298256 + 12065494025764 = 2873484^2 + 3473542^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20322404324020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80572024 + ... + 80823856.

It is an arithmetic number, because the mean of its divisors is an integer number (625633850457).

Almost surely, 2^{20322404324020} is an apocalyptic number.

20322404324020 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 20322404324020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22522818616452).

20322404324020 is an abundant number, since it is smaller than the sum of its proper divisors (24723232908884).

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

20322404324020 is a wasteful number, since it uses less digits than its factorization.

20322404324020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263057 (or 263036 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 20322404324020 its reverse (2042340422302), we get a palindrome (22364744746322).

The spelling of 20322404324020 in words is "twenty trillion, three hundred twenty-two billion, four hundred four million, three hundred twenty-four thousand, twenty".