20311223323 has 4 divisors (see below), whose sum is σ = 20311833600. Its totient is φ = 20310613048.

The previous prime is 20311223311. The next prime is 20311223327. The reversal of 20311223323 is 32332211302.

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

It is a cyclic number.

It is not a de Polignac number, because 20311223323 - 2⁵ = 20311223291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20311223294 and 20311223303.

It is not an unprimeable number, because it can be changed into a prime (20311223327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252148 + ... + 322801.

It is an arithmetic number, because the mean of its divisors is an integer number (5077958400).

Almost surely, 2^20311223323 is an apocalyptic number.

20311223323 is a deficient number, since it is larger than the sum of its proper divisors (610277).

20311223323 is an equidigital number, since it uses as much as digits as its factorization.

20311223323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610276.

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

Adding to 20311223323 its reverse (32332211302), we get a palindrome (52643434625).

The spelling of 20311223323 in words is "twenty billion, three hundred eleven million, two hundred twenty-three thousand, three hundred twenty-three".