21344423339 has 2 divisors, whose sum is σ = 21344423340. Its totient is φ = 21344423338.

The previous prime is 21344423329. The next prime is 21344423411. The reversal of 21344423339 is 93332444312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21344423339 - 2⁴ = 21344423323 is a prime.

It is a super-3 number, since 3×21344423339³ (a number of 32 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21344423329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10672211669 + 10672211670.

It is an arithmetic number, because the mean of its divisors is an integer number (10672211670).

Almost surely, 2^21344423339 is an apocalyptic number.

21344423339 is a deficient number, since it is larger than the sum of its proper divisors (1).

21344423339 is an equidigital number, since it uses as much as digits as its factorization.

21344423339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 38.

The spelling of 21344423339 in words is "twenty-one billion, three hundred forty-four million, four hundred twenty-three thousand, three hundred thirty-nine".