21432330589 has 2 divisors, whose sum is σ = 21432330590. Its totient is φ = 21432330588.

The previous prime is 21432330533. The next prime is 21432330617. The reversal of 21432330589 is 98503323412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21394912900 + 37417689 = 146270^2 + 6117^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21432330589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21432330509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716165294 + 10716165295.

It is an arithmetic number, because the mean of its divisors is an integer number (10716165295).

Almost surely, 2^21432330589 is an apocalyptic number.

It is an amenable number.

21432330589 is a deficient number, since it is larger than the sum of its proper divisors (1).

21432330589 is an equidigital number, since it uses as much as digits as its factorization.

21432330589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 21432330589 in words is "twenty-one billion, four hundred thirty-two million, three hundred thirty thousand, five hundred eighty-nine".