20313331321 has 4 divisors (see below), whose sum is σ = 20379498832. Its totient is φ = 20247163812.

The previous prime is 20313331301. The next prime is 20313331361. The reversal of 20313331321 is 12313331302.

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.

It is a cyclic number.

It is not a de Polignac number, because 20313331321 - 2⁵ = 20313331289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20313331292 and 20313331301.

It is not an unprimeable number, because it can be changed into a prime (20313331301) 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 3 ways as a sum of consecutive naturals, for example, 33083295 + ... + 33083908.

It is an arithmetic number, because the mean of its divisors is an integer number (5094874708).

Almost surely, 2^20313331321 is an apocalyptic number.

It is an amenable number.

20313331321 is a deficient number, since it is larger than the sum of its proper divisors (66167511).

20313331321 is an equidigital number, since it uses as much as digits as its factorization.

20313331321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66167510.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 20313331321 its reverse (12313331302), we get a palindrome (32626662623).

The spelling of 20313331321 in words is "twenty billion, three hundred thirteen million, three hundred thirty-one thousand, three hundred twenty-one".