21433430159 has 2 divisors, whose sum is σ = 21433430160. Its totient is φ = 21433430158.

The previous prime is 21433430077. The next prime is 21433430167. The reversal of 21433430159 is 95103433412.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21433430159 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 (21433430059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716715079 + 10716715080.

It is an arithmetic number, because the mean of its divisors is an integer number (10716715080).

Almost surely, 2^21433430159 is an apocalyptic number.

21433430159 is a deficient number, since it is larger than the sum of its proper divisors (1).

21433430159 is an equidigital number, since it uses as much as digits as its factorization.

21433430159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 21433430159 in words is "twenty-one billion, four hundred thirty-three million, four hundred thirty thousand, one hundred fifty-nine".