20321131233120 has 192 divisors, whose sum is σ = 64835261568000. Its totient is φ = 5349265698816.

The previous prime is 20321131233113. The next prime is 20321131233163. The reversal of 20321131233120 is 2133213112302.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 191784316 + ... + 191890244.

It is an arithmetic number, because the mean of its divisors is an integer number (337683654000).

Almost surely, 2^{20321131233120} is an apocalyptic number.

20321131233120 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 20321131233120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32417630784000).

20321131233120 is an abundant number, since it is smaller than the sum of its proper divisors (44514130334880).

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

20321131233120 is a wasteful number, since it uses less digits than its factorization.

20321131233120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111085 (or 111077 counting only the distinct ones).

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

Adding to 20321131233120 its reverse (2133213112302), we get a palindrome (22454344345422).

The spelling of 20321131233120 in words is "twenty trillion, three hundred twenty-one billion, one hundred thirty-one million, two hundred thirty-three thousand, one hundred twenty".