13421420443 has 2 divisors, whose sum is σ = 13421420444. Its totient is φ = 13421420442.

The previous prime is 13421420401. The next prime is 13421420473. The reversal of 13421420443 is 34402412431.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13421420443 is a prime.

It is not a weakly prime, because it can be changed into another prime (13421420473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6710710221 + 6710710222.

It is an arithmetic number, because the mean of its divisors is an integer number (6710710222).

Almost surely, 2^13421420443 is an apocalyptic number.

13421420443 is a deficient number, since it is larger than the sum of its proper divisors (1).

13421420443 is an equidigital number, since it uses as much as digits as its factorization.

13421420443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 13421420443 its reverse (34402412431), we get a palindrome (47823832874).

The spelling of 13421420443 in words is "thirteen billion, four hundred twenty-one million, four hundred twenty thousand, four hundred forty-three".