21034044443 has 8 divisors (see below), whose sum is σ = 21271967808. Its totient is φ = 20796551424.

The previous prime is 21034044413. The next prime is 21034044497. The reversal of 21034044443 is 34444043012.

It is a happy number.

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 21034044443 - 2⁶ = 21034044379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21034044413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8771 + ... + 205292.

It is an arithmetic number, because the mean of its divisors is an integer number (2658995976).

Almost surely, 2^21034044443 is an apocalyptic number.

21034044443 is a deficient number, since it is larger than the sum of its proper divisors (237923365).

21034044443 is a wasteful number, since it uses less digits than its factorization.

21034044443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215173.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 21034044443 its reverse (34444043012), we get a palindrome (55478087455).

The spelling of 21034044443 in words is "twenty-one billion, thirty-four million, forty-four thousand, four hundred forty-three".