21444044412433 has 8 divisors (see below), whose sum is σ = 22175528889600. Its totient is φ = 20715043754640.

The previous prime is 21444044412361. The next prime is 21444044412437. The reversal of 21444044412433 is 33421444044412.

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 21444044412433 - 2⁹ = 21444044411921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21444044412437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 620937283 + ... + 620971816.

It is an arithmetic number, because the mean of its divisors is an integer number (2771941111200).

Almost surely, 2^{21444044412433} is an apocalyptic number.

It is an amenable number.

21444044412433 is a deficient number, since it is larger than the sum of its proper divisors (731484477167).

21444044412433 is a wasteful number, since it uses less digits than its factorization.

21444044412433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241909687.

The product of its (nonzero) digits is 589824, while the sum is 40.

Adding to 21444044412433 its reverse (33421444044412), we get a palindrome (54865488456845).

The spelling of 21444044412433 in words is "twenty-one trillion, four hundred forty-four billion, forty-four million, four hundred twelve thousand, four hundred thirty-three".