21241328347 has 2 divisors, whose sum is σ = 21241328348. Its totient is φ = 21241328346.

The previous prime is 21241328327. The next prime is 21241328363. The reversal of 21241328347 is 74382314212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21241328347 - 2¹⁹ = 21240804059 is a prime.

It is not a weakly prime, because it can be changed into another prime (21241328327) 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, 10620664173 + 10620664174.

It is an arithmetic number, because the mean of its divisors is an integer number (10620664174).

Almost surely, 2^21241328347 is an apocalyptic number.

21241328347 is a deficient number, since it is larger than the sum of its proper divisors (1).

21241328347 is an equidigital number, since it uses as much as digits as its factorization.

21241328347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 37.

The spelling of 21241328347 in words is "twenty-one billion, two hundred forty-one million, three hundred twenty-eight thousand, three hundred forty-seven".