20331321121320 has 256 divisors, whose sum is σ = 70499664506880. Its totient is φ = 4635797606400.

The previous prime is 20331321121313. The next prime is 20331321121339. The reversal of 20331321121320 is 2312112313302.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33607029 + ... + 34206651.

It is an arithmetic number, because the mean of its divisors is an integer number (275389314480).

Almost surely, 2^{20331321121320} is an apocalyptic number.

20331321121320 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 20331321121320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35249832253440).

20331321121320 is an abundant number, since it is smaller than the sum of its proper divisors (50168343385560).

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

20331321121320 is a wasteful number, since it uses less digits than its factorization.

20331321121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601176 (or 601172 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 20331321121320 its reverse (2312112313302), we get a palindrome (22643433434622).

The spelling of 20331321121320 in words is "twenty trillion, three hundred thirty-one billion, three hundred twenty-one million, one hundred twenty-one thousand, three hundred twenty".