20321120 has 96 divisors (see below), whose sum is σ = 52690176. Its totient is φ = 7372800.

The previous prime is 20321087. The next prime is 20321131. The reversal of 20321120 is 2112302.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84200 + ... + 84440.

It is an arithmetic number, because the mean of its divisors is an integer number (548856).

Almost surely, 2^20321120 is an apocalyptic number.

20321120 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 20321120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26345088).

20321120 is an abundant number, since it is smaller than the sum of its proper divisors (32369056).

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

20321120 is a wasteful number, since it uses less digits than its factorization.

20321120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 296 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20321120 is about 4507.8952960334. The cubic root of 20321120 is about 272.8868114367.

Adding to 20321120 its reverse (2112302), we get a palindrome (22433422).

The spelling of 20321120 in words is "twenty million, three hundred twenty-one thousand, one hundred twenty".