20323213321 has 4 divisors (see below), whose sum is σ = 20354919444. Its totient is φ = 20291507200.

The previous prime is 20323213319. The next prime is 20323213331. The reversal of 20323213321 is 12331232302.

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 10941160000 + 9382053321 = 104600^2 + 96861^2 .

It is a cyclic number.

It is not a de Polignac number, because 20323213321 - 2¹ = 20323213319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20323213292 and 20323213301.

It is not an unprimeable number, because it can be changed into a prime (20323213331) 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, 15852100 + ... + 15853381.

It is an arithmetic number, because the mean of its divisors is an integer number (5088729861).

Almost surely, 2^20323213321 is an apocalyptic number.

It is an amenable number.

20323213321 is a deficient number, since it is larger than the sum of its proper divisors (31706123).

20323213321 is an equidigital number, since it uses as much as digits as its factorization.

20323213321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31706122.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 20323213321 its reverse (12331232302), we get a palindrome (32654445623).

The spelling of 20323213321 in words is "twenty billion, three hundred twenty-three million, two hundred thirteen thousand, three hundred twenty-one".