20331332321 has 8 divisors (see below), whose sum is σ = 20428579080. Its totient is φ = 20234171392.

The previous prime is 20331332297. The next prime is 20331332339. The reversal of 20331332321 is 12323313302.

It can be written as a sum of positive squares in 4 ways, for example, as 1311888400 + 19019443921 = 36220^2 + 137911^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20331332321 - 2²⁶ = 20264223457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20331332821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481385 + ... + 521913.

It is an arithmetic number, because the mean of its divisors is an integer number (2553572385).

Almost surely, 2^20331332321 is an apocalyptic number.

It is an amenable number.

20331332321 is a deficient number, since it is larger than the sum of its proper divisors (97246759).

20331332321 is a wasteful number, since it uses less digits than its factorization.

20331332321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42915.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 20331332321 its reverse (12323313302), we get a palindrome (32654645623).

The spelling of 20331332321 in words is "twenty billion, three hundred thirty-one million, three hundred thirty-two thousand, three hundred twenty-one".