21041344443 has 32 divisors (see below), whose sum is σ = 33170360832. Its totient is φ = 11614176000.

The previous prime is 21041344433. The next prime is 21041344459. The reversal of 21041344443 is 34444314012.

It is not a de Polignac number, because 21041344443 - 2⁴ = 21041344427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21041344443.

It is not an unprimeable number, because it can be changed into a prime (21041344433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34021 + ... + 207942.

It is an arithmetic number, because the mean of its divisors is an integer number (1036573776).

Almost surely, 2^21041344443 is an apocalyptic number.

21041344443 is a deficient number, since it is larger than the sum of its proper divisors (12129016389).

21041344443 is a wasteful number, since it uses less digits than its factorization.

21041344443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242115.

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

Adding to 21041344443 its reverse (34444314012), we get a palindrome (55485658455).

The spelling of 21041344443 in words is "twenty-one billion, forty-one million, three hundred forty-four thousand, four hundred forty-three".