21243014339 has 2 divisors, whose sum is σ = 21243014340. Its totient is φ = 21243014338.

The previous prime is 21243014297. The next prime is 21243014447. The reversal of 21243014339 is 93341034212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21243014339 - 2³² = 16948047043 is a prime.

It is not a weakly prime, because it can be changed into another prime (21243017339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10621507169 + 10621507170.

It is an arithmetic number, because the mean of its divisors is an integer number (10621507170).

Almost surely, 2^21243014339 is an apocalyptic number.

21243014339 is a deficient number, since it is larger than the sum of its proper divisors (1).

21243014339 is an equidigital number, since it uses as much as digits as its factorization.

21243014339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 21243014339 in words is "twenty-one billion, two hundred forty-three million, fourteen thousand, three hundred thirty-nine".