21323041443 has 36 divisors (see below), whose sum is σ = 34283165280. Its totient is φ = 12759420960.

The previous prime is 21323041387. The next prime is 21323041447. The reversal of 21323041443 is 34414032312.

21323041443 is a `hidden beast` number, since 2 + 13 + 230 + 414 + 4 + 3 = 666.

It is not a de Polignac number, because 21323041443 - 2¹⁰ = 21323040419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21323041447) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 37896 + ... + 209957.

Almost surely, 2^21323041443 is an apocalyptic number.

21323041443 is a deficient number, since it is larger than the sum of its proper divisors (12960123837).

21323041443 is a wasteful number, since it uses less digits than its factorization.

21323041443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247960 (or 247946 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21323041443 its reverse (34414032312), we get a palindrome (55737073755).

The spelling of 21323041443 in words is "twenty-one billion, three hundred twenty-three million, forty-one thousand, four hundred forty-three".