21443141244 has 24 divisors (see below), whose sum is σ = 57181710208. Its totient is φ = 6126611760.

The previous prime is 21443141221. The next prime is 21443141257. The reversal of 21443141244 is 44214134412.

It is a happy number.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127637662 + ... + 127637829.

Almost surely, 2^21443141244 is an apocalyptic number.

It is an amenable number.

21443141244 is an abundant number, since it is smaller than the sum of its proper divisors (35738568964).

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

21443141244 is a wasteful number, since it uses less digits than its factorization.

21443141244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255275505 (or 255275503 counting only the distinct ones).

The product of its digits is 12288, while the sum is 30.

Adding to 21443141244 its reverse (44214134412), we get a palindrome (65657275656).

The spelling of 21443141244 in words is "twenty-one billion, four hundred forty-three million, one hundred forty-one thousand, two hundred forty-four".