21444344241 has 4 divisors (see below), whose sum is σ = 28592458992. Its totient is φ = 14296229492.

The previous prime is 21444344203. The next prime is 21444344287. The reversal of 21444344241 is 14244344412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21444344241 - 2⁹ = 21444343729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21444344291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3574057371 + ... + 3574057376.

It is an arithmetic number, because the mean of its divisors is an integer number (7148114748).

Almost surely, 2^21444344241 is an apocalyptic number.

It is an amenable number.

21444344241 is a deficient number, since it is larger than the sum of its proper divisors (7148114751).

21444344241 is an equidigital number, since it uses as much as digits as its factorization.

21444344241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7148114750.

The product of its digits is 49152, while the sum is 33.

Adding to 21444344241 its reverse (14244344412), we get a palindrome (35688688653).

The spelling of 21444344241 in words is "twenty-one billion, four hundred forty-four million, three hundred forty-four thousand, two hundred forty-one".