21244041443 has 8 divisors (see below), whose sum is σ = 21641786880. Its totient is φ = 20849517000.

The previous prime is 21244041439. The next prime is 21244041499. The reversal of 21244041443 is 34414044212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21244041443 - 2² = 21244041439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21244041943) 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 in 7 ways as a sum of consecutive naturals, for example, 791933 + ... + 818318.

It is an arithmetic number, because the mean of its divisors is an integer number (2705223360).

Almost surely, 2^21244041443 is an apocalyptic number.

21244041443 is a deficient number, since it is larger than the sum of its proper divisors (397745437).

21244041443 is a wasteful number, since it uses less digits than its factorization.

21244041443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610497.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 21244041443 its reverse (34414044212), we get a palindrome (55658085655).

The spelling of 21244041443 in words is "twenty-one billion, two hundred forty-four million, forty-one thousand, four hundred forty-three".