21000068339 has 2 divisors, whose sum is σ = 21000068340. Its totient is φ = 21000068338.

The previous prime is 21000068321. The next prime is 21000068357. The reversal of 21000068339 is 93386000012.

It is a balanced prime because it is at equal distance from previous prime (21000068321) and next prime (21000068357).

It is a cyclic number.

It is not a de Polignac number, because 21000068339 - 2⁸ = 21000068083 is a prime.

It is a super-3 number, since 3×21000068339³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (21000068399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500034169 + 10500034170.

It is an arithmetic number, because the mean of its divisors is an integer number (10500034170).

Almost surely, 2^21000068339 is an apocalyptic number.

21000068339 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000068339 is an equidigital number, since it uses as much as digits as its factorization.

21000068339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The spelling of 21000068339 in words is "twenty-one billion, sixty-eight thousand, three hundred thirty-nine".