20013113443 has 2 divisors, whose sum is σ = 20013113444. Its totient is φ = 20013113442.

The previous prime is 20013113399. The next prime is 20013113521. The reversal of 20013113443 is 34431131002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20013113443 is a prime.

It is not a weakly prime, because it can be changed into another prime (20013113843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006556721 + 10006556722.

It is an arithmetic number, because the mean of its divisors is an integer number (10006556722).

Almost surely, 2^20013113443 is an apocalyptic number.

20013113443 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013113443 is an equidigital number, since it uses as much as digits as its factorization.

20013113443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20013113443 its reverse (34431131002), we get a palindrome (54444244445).

The spelling of 20013113443 in words is "twenty billion, thirteen million, one hundred thirteen thousand, four hundred forty-three".