21336014309 has 2 divisors, whose sum is σ = 21336014310. Its totient is φ = 21336014308.

The previous prime is 21336014257. The next prime is 21336014419. The reversal of 21336014309 is 90341063312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20398123684 + 937890625 = 142822^2 + 30625^2 .

It is a cyclic number.

It is not a de Polignac number, because 21336014309 - 2²⁰ = 21334965733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21333014309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10668007154 + 10668007155.

It is an arithmetic number, because the mean of its divisors is an integer number (10668007155).

Almost surely, 2^21336014309 is an apocalyptic number.

It is an amenable number.

21336014309 is a deficient number, since it is larger than the sum of its proper divisors (1).

21336014309 is an equidigital number, since it uses as much as digits as its factorization.

21336014309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The spelling of 21336014309 in words is "twenty-one billion, three hundred thirty-six million, fourteen thousand, three hundred nine".