20331334321 has 4 divisors (see below), whose sum is σ = 20339129700. Its totient is φ = 20323538944.

The previous prime is 20331334253. The next prime is 20331334367. The reversal of 20331334321 is 12343313302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10622188096 + 9709146225 = 103064^2 + 98535^2 .

It is a cyclic number.

It is not a de Polignac number, because 20331334321 - 2⁷ = 20331334193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20331334381) 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, 3893776 + ... + 3898993.

It is an arithmetic number, because the mean of its divisors is an integer number (5084782425).

Almost surely, 2^20331334321 is an apocalyptic number.

It is an amenable number.

20331334321 is a deficient number, since it is larger than the sum of its proper divisors (7795379).

20331334321 is an equidigital number, since it uses as much as digits as its factorization.

20331334321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7795378.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 20331334321 its reverse (12343313302), we get a palindrome (32674647623).

The spelling of 20331334321 in words is "twenty billion, three hundred thirty-one million, three hundred thirty-four thousand, three hundred twenty-one".