20411213443 has 2 divisors, whose sum is σ = 20411213444. Its totient is φ = 20411213442.

The previous prime is 20411213441. The next prime is 20411213447. The reversal of 20411213443 is 34431211402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20411213443 - 2¹ = 20411213441 is a prime.

Together with 20411213441, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20411213441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10205606721 + 10205606722.

It is an arithmetic number, because the mean of its divisors is an integer number (10205606722).

Almost surely, 2^20411213443 is an apocalyptic number.

20411213443 is a deficient number, since it is larger than the sum of its proper divisors (1).

20411213443 is an equidigital number, since it uses as much as digits as its factorization.

20411213443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 20411213443 its reverse (34431211402), we get a palindrome (54842424845).

The spelling of 20411213443 in words is "twenty billion, four hundred eleven million, two hundred thirteen thousand, four hundred forty-three".