21334345013 has 2 divisors, whose sum is σ = 21334345014. Its totient is φ = 21334345012.

The previous prime is 21334345009. The next prime is 21334345027. The reversal of 21334345013 is 31054343312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21334107844 + 237169 = 146062^2 + 487^2 .

It is a cyclic number.

It is not a de Polignac number, because 21334345013 - 2² = 21334345009 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21334345093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10667172506 + 10667172507.

It is an arithmetic number, because the mean of its divisors is an integer number (10667172507).

Almost surely, 2^21334345013 is an apocalyptic number.

It is an amenable number.

21334345013 is a deficient number, since it is larger than the sum of its proper divisors (1).

21334345013 is an equidigital number, since it uses as much as digits as its factorization.

21334345013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 29.

Adding to 21334345013 its reverse (31054343312), we get a palindrome (52388688325).

The spelling of 21334345013 in words is "twenty-one billion, three hundred thirty-four million, three hundred forty-five thousand, thirteen".