21414431443 has 2 divisors, whose sum is σ = 21414431444. Its totient is φ = 21414431442.

The previous prime is 21414431417. The next prime is 21414431449. The reversal of 21414431443 is 34413441412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21414431443 - 2⁹ = 21414430931 is a prime.

It is a super-3 number, since 3×21414431443³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (21414431449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10707215721 + 10707215722.

It is an arithmetic number, because the mean of its divisors is an integer number (10707215722).

Almost surely, 2^21414431443 is an apocalyptic number.

21414431443 is a deficient number, since it is larger than the sum of its proper divisors (1).

21414431443 is an equidigital number, since it uses as much as digits as its factorization.

21414431443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 31.

Adding to 21414431443 its reverse (34413441412), we get a palindrome (55827872855).

The spelling of 21414431443 in words is "twenty-one billion, four hundred fourteen million, four hundred thirty-one thousand, four hundred forty-three".