20323311213 has 4 divisors (see below), whose sum is σ = 27097748288. Its totient is φ = 13548874140.

The previous prime is 20323311209. The next prime is 20323311223. The reversal of 20323311213 is 31211332302.

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 not a de Polignac number, because 20323311213 - 2² = 20323311209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20323311213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323311223) 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, 3387218533 + ... + 3387218538.

It is an arithmetic number, because the mean of its divisors is an integer number (6774437072).

Almost surely, 2^20323311213 is an apocalyptic number.

It is an amenable number.

20323311213 is a deficient number, since it is larger than the sum of its proper divisors (6774437075).

20323311213 is an equidigital number, since it uses as much as digits as its factorization.

20323311213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6774437074.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 20323311213 its reverse (31211332302), we get a palindrome (51534643515).

The spelling of 20323311213 in words is "twenty billion, three hundred twenty-three million, three hundred eleven thousand, two hundred thirteen".