20321304010420 has 192 divisors, whose sum is σ = 51290652672000. Its totient is φ = 6616750187520.

The previous prime is 20321304010369. The next prime is 20321304010429. The reversal of 20321304010420 is 2401040312302.

It is a junction number, because it is equal to n+sod(n) for n = 20321304010391 and 20321304010400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321304010429) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 62886021 + ... + 63208339.

It is an arithmetic number, because the mean of its divisors is an integer number (267138816000).

Almost surely, 2^{20321304010420} is an apocalyptic number.

20321304010420 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 20321304010420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25645326336000).

20321304010420 is an abundant number, since it is smaller than the sum of its proper divisors (30969348661580).

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

20321304010420 is a wasteful number, since it uses less digits than its factorization.

20321304010420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322638 (or 322636 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20321304010420 its reverse (2401040312302), we get a palindrome (22722344322722).

The spelling of 20321304010420 in words is "twenty trillion, three hundred twenty-one billion, three hundred four million, ten thousand, four hundred twenty".