21444404341 has 2 divisors, whose sum is σ = 21444404342. Its totient is φ = 21444404340.

The previous prime is 21444404297. The next prime is 21444404353. The reversal of 21444404341 is 14340444412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21276598225 + 167806116 = 145865^2 + 12954^2 .

It is a cyclic number.

It is not a de Polignac number, because 21444404341 - 2²⁵ = 21410849909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21444404141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10722202170 + 10722202171.

It is an arithmetic number, because the mean of its divisors is an integer number (10722202171).

Almost surely, 2^21444404341 is an apocalyptic number.

It is an amenable number.

21444404341 is a deficient number, since it is larger than the sum of its proper divisors (1).

21444404341 is an equidigital number, since it uses as much as digits as its factorization.

21444404341 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 21444404341 its reverse (14340444412), we get a palindrome (35784848753).

The spelling of 21444404341 in words is "twenty-one billion, four hundred forty-four million, four hundred four thousand, three hundred forty-one".