20311313223 has 4 divisors (see below), whose sum is σ = 27081750968. Its totient is φ = 13540875480.

The previous prime is 20311313189. The next prime is 20311313237. The reversal of 20311313223 is 32231311302.

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

It is not a de Polignac number, because 20311313223 - 2¹² = 20311309127 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 20311313223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311312223) 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, 3385218868 + ... + 3385218873.

It is an arithmetic number, because the mean of its divisors is an integer number (6770437742).

Almost surely, 2^20311313223 is an apocalyptic number.

20311313223 is a deficient number, since it is larger than the sum of its proper divisors (6770437745).

20311313223 is an equidigital number, since it uses as much as digits as its factorization.

20311313223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6770437744.

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

Adding to 20311313223 its reverse (32231311302), we get a palindrome (52542624525).

The spelling of 20311313223 in words is "twenty billion, three hundred eleven million, three hundred thirteen thousand, two hundred twenty-three".