21433044343 has 2 divisors, whose sum is σ = 21433044344. Its totient is φ = 21433044342.

The previous prime is 21433044319. The next prime is 21433044349. The reversal of 21433044343 is 34344033412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21433044343 - 2³³ = 12843109751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21433044349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716522171 + 10716522172.

It is an arithmetic number, because the mean of its divisors is an integer number (10716522172).

Almost surely, 2^21433044343 is an apocalyptic number.

21433044343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21433044343 is an equidigital number, since it uses as much as digits as its factorization.

21433044343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 21433044343 its reverse (34344033412), we get a palindrome (55777077755).

The spelling of 21433044343 in words is "twenty-one billion, four hundred thirty-three million, forty-four thousand, three hundred forty-three".