21344030303 has 2 divisors, whose sum is σ = 21344030304. Its totient is φ = 21344030302.

The previous prime is 21344030293. The next prime is 21344030353. The reversal of 21344030303 is 30303044312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21344030303 - 2⁴ = 21344030287 is a prime.

It is a Sophie Germain prime.

21344030303 is a modest number, since divided by 30303 gives 21344 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21344030353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10672015151 + 10672015152.

It is an arithmetic number, because the mean of its divisors is an integer number (10672015152).

Almost surely, 2^21344030303 is an apocalyptic number.

21344030303 is a deficient number, since it is larger than the sum of its proper divisors (1).

21344030303 is an equidigital number, since it uses as much as digits as its factorization.

21344030303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 21344030303 its reverse (30303044312), we get a palindrome (51647074615).

The spelling of 21344030303 in words is "twenty-one billion, three hundred forty-four million, thirty thousand, three hundred three".