20311122243 has 4 divisors (see below), whose sum is σ = 27081496328. Its totient is φ = 13540748160.

The previous prime is 20311122241. The next prime is 20311122269. The reversal of 20311122243 is 34222111302.

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

It is not a de Polignac number, because 20311122243 - 2¹ = 20311122241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20311122241) 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, 3385187038 + ... + 3385187043.

It is an arithmetic number, because the mean of its divisors is an integer number (6770374082).

Almost surely, 2^20311122243 is an apocalyptic number.

20311122243 is a deficient number, since it is larger than the sum of its proper divisors (6770374085).

20311122243 is an equidigital number, since it uses as much as digits as its factorization.

20311122243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6770374084.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20311122243 its reverse (34222111302), we get a palindrome (54533233545).

The spelling of 20311122243 in words is "twenty billion, three hundred eleven million, one hundred twenty-two thousand, two hundred forty-three".