20440333321 has 4 divisors (see below), whose sum is σ = 21099698944. Its totient is φ = 19780967700.

The previous prime is 20440333283. The next prime is 20440333337. The reversal of 20440333321 is 12333304402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12333304402 = 2 ⋅6166652201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20440333321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20440336321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329682765 + ... + 329682826.

It is an arithmetic number, because the mean of its divisors is an integer number (5274924736).

Almost surely, 2^20440333321 is an apocalyptic number.

It is an amenable number.

20440333321 is a deficient number, since it is larger than the sum of its proper divisors (659365623).

20440333321 is an equidigital number, since it uses as much as digits as its factorization.

20440333321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659365622.

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 20440333321 its reverse (12333304402), we get a palindrome (32773637723).

The spelling of 20440333321 in words is "twenty billion, four hundred forty million, three hundred thirty-three thousand, three hundred twenty-one".