21344044333 has 2 divisors, whose sum is σ = 21344044334. Its totient is φ = 21344044332.

The previous prime is 21344044277. The next prime is 21344044369. The reversal of 21344044333 is 33344044312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18579598249 + 2764446084 = 136307^2 + 52578^2 .

It is a cyclic number.

It is not a de Polignac number, because 21344044333 - 2⁹ = 21344043821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21344044295 and 21344044304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21344044133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10672022166 + 10672022167.

It is an arithmetic number, because the mean of its divisors is an integer number (10672022167).

Almost surely, 2^21344044333 is an apocalyptic number.

It is an amenable number.

21344044333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21344044333 is an equidigital number, since it uses as much as digits as its factorization.

21344044333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 21344044333 its reverse (33344044312), we get a palindrome (54688088645).

The spelling of 21344044333 in words is "twenty-one billion, three hundred forty-four million, forty-four thousand, three hundred thirty-three".