21334442333 has 2 divisors, whose sum is σ = 21334442334. Its totient is φ = 21334442332.

The previous prime is 21334442329. The next prime is 21334442369. The reversal of 21334442333 is 33324443312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11134048324 + 10200394009 = 105518^2 + 100997^2 .

It is a cyclic number.

It is not a de Polignac number, because 21334442333 - 2² = 21334442329 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21334442333.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21334444333) 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, 10667221166 + 10667221167.

It is an arithmetic number, because the mean of its divisors is an integer number (10667221167).

Almost surely, 2^21334442333 is an apocalyptic number.

It is an amenable number.

21334442333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21334442333 is an equidigital number, since it uses as much as digits as its factorization.

21334442333 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 32.

Adding to 21334442333 its reverse (33324443312), we get a palindrome (54658885645).

The spelling of 21334442333 in words is "twenty-one billion, three hundred thirty-four million, four hundred forty-two thousand, three hundred thirty-three".