21244334305 has 8 divisors (see below), whose sum is σ = 25800348672. Its totient is φ = 16790702448.

The previous prime is 21244334299. The next prime is 21244334347. The reversal of 21244334305 is 50343344212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21244334305 - 2⁵ = 21244334273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25595169 + ... + 25595998.

It is an arithmetic number, because the mean of its divisors is an integer number (3225043584).

Almost surely, 2^21244334305 is an apocalyptic number.

It is an amenable number.

21244334305 is a deficient number, since it is larger than the sum of its proper divisors (4556014367).

21244334305 is an equidigital number, since it uses as much as digits as its factorization.

21244334305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51191255.

The product of its (nonzero) digits is 34560, while the sum is 31.

Adding to 21244334305 its reverse (50343344212), we get a palindrome (71587678517).

The spelling of 21244334305 in words is "twenty-one billion, two hundred forty-four million, three hundred thirty-four thousand, three hundred five".