21344444003 has 2 divisors, whose sum is σ = 21344444004. Its totient is φ = 21344444002.

The previous prime is 21344443999. The next prime is 21344444047. The reversal of 21344444003 is 30044444312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21344444003 - 2² = 21344443999 is a prime.

It is not a weakly prime, because it can be changed into another prime (21344444603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10672222001 + 10672222002.

It is an arithmetic number, because the mean of its divisors is an integer number (10672222002).

Almost surely, 2^21344444003 is an apocalyptic number.

21344444003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21344444003 is an equidigital number, since it uses as much as digits as its factorization.

21344444003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 21344444003 its reverse (30044444312), we get a palindrome (51388888315).

The spelling of 21344444003 in words is "twenty-one billion, three hundred forty-four million, four hundred forty-four thousand, three".