21044024411 has 8 divisors (see below), whose sum is σ = 21338123184. Its totient is φ = 20750083200.

The previous prime is 21044024399. The next prime is 21044024453. The reversal of 21044024411 is 11442044012.

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 21044024411 - 2⁶ = 21044024347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21044024711) 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, 243695 + ... + 318551.

It is an arithmetic number, because the mean of its divisors is an integer number (2667265398).

Almost surely, 2^21044024411 is an apocalyptic number.

21044024411 is a deficient number, since it is larger than the sum of its proper divisors (294098773).

21044024411 is an equidigital number, since it uses as much as digits as its factorization.

21044024411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78781.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 21044024411 its reverse (11442044012), we get a palindrome (32486068423).

The spelling of 21044024411 in words is "twenty-one billion, forty-four million, twenty-four thousand, four hundred eleven".