21342002399 has 2 divisors, whose sum is σ = 21342002400. Its totient is φ = 21342002398.

The previous prime is 21342002389. The next prime is 21342002411. The reversal of 21342002399 is 99320024312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21342002399 - 2¹² = 21341998303 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21342002329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10671001199 + 10671001200.

It is an arithmetic number, because the mean of its divisors is an integer number (10671001200).

Almost surely, 2^21342002399 is an apocalyptic number.

21342002399 is a deficient number, since it is larger than the sum of its proper divisors (1).

21342002399 is an equidigital number, since it uses as much as digits as its factorization.

21342002399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The spelling of 21342002399 in words is "twenty-one billion, three hundred forty-two million, two thousand, three hundred ninety-nine".