20311113343 has 4 divisors (see below), whose sum is σ = 20358239328. Its totient is φ = 20263987360.

The previous prime is 20311113313. The next prime is 20311113359. The reversal of 20311113343 is 34331111302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34331111302 = 2 ⋅17165555651.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20311113343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311113313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23562346 + ... + 23563207.

It is an arithmetic number, because the mean of its divisors is an integer number (5089559832).

Almost surely, 2^20311113343 is an apocalyptic number.

20311113343 is a deficient number, since it is larger than the sum of its proper divisors (47125985).

20311113343 is an equidigital number, since it uses as much as digits as its factorization.

20311113343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47125984.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 20311113343 its reverse (34331111302), we get a palindrome (54642224645).

The spelling of 20311113343 in words is "twenty billion, three hundred eleven million, one hundred thirteen thousand, three hundred forty-three".