21441344303 has 4 divisors (see below), whose sum is σ = 22373576688. Its totient is φ = 20509111920.

The previous prime is 21441344291. The next prime is 21441344357. The reversal of 21441344303 is 30344314412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21441344303 - 2⁸ = 21441344047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21441344363) 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 in 3 ways as a sum of consecutive naturals, for example, 466116158 + ... + 466116203.

It is an arithmetic number, because the mean of its divisors is an integer number (5593394172).

Almost surely, 2^21441344303 is an apocalyptic number.

21441344303 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21441344303 is a deficient number, since it is larger than the sum of its proper divisors (932232385).

21441344303 is an equidigital number, since it uses as much as digits as its factorization.

21441344303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932232384.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 21441344303 its reverse (30344314412), we get a palindrome (51785658715).

The spelling of 21441344303 in words is "twenty-one billion, four hundred forty-one million, three hundred forty-four thousand, three hundred three".