20321323120 has 160 divisors (see below), whose sum is σ = 57000816000. Its totient is φ = 6726795264.

The previous prime is 20321323117. The next prime is 20321323151. The reversal of 20321323120 is 2132312302.

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, 782992 + ... + 808528.

It is an arithmetic number, because the mean of its divisors is an integer number (356255100).

Almost surely, 2^20321323120 is an apocalyptic number.

20321323120 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 20321323120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28500408000).

20321323120 is an abundant number, since it is smaller than the sum of its proper divisors (36679492880).

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

20321323120 is a wasteful number, since it uses less digits than its factorization.

20321323120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25600 (or 25580 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20321323120 its reverse (2132312302), we get a palindrome (22453635422).

The spelling of 20321323120 in words is "twenty billion, three hundred twenty-one million, three hundred twenty-three thousand, one hundred twenty".