21443132244 has 12 divisors (see below), whose sum is σ = 50033975264. Its totient is φ = 7147710744.

The previous prime is 21443132219. The next prime is 21443132251. The reversal of 21443132244 is 44223134412.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 893463832 + ... + 893463855.

Almost surely, 2^21443132244 is an apocalyptic number.

It is an amenable number.

21443132244 is an abundant number, since it is smaller than the sum of its proper divisors (28590843020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21443132244 is a wasteful number, since it uses less digits than its factorization.

21443132244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786927694 (or 1786927692 counting only the distinct ones).

The product of its digits is 18432, while the sum is 30.

Adding to 21443132244 its reverse (44223134412), we get a palindrome (65666266656).

The spelling of 21443132244 in words is "twenty-one billion, four hundred forty-three million, one hundred thirty-two thousand, two hundred forty-four".