20324543489 has 2 divisors, whose sum is σ = 20324543490. Its totient is φ = 20324543488.

The previous prime is 20324543471. The next prime is 20324543543. The reversal of 20324543489 is 98434542302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18819724225 + 1504819264 = 137185^2 + 38792^2 .

It is a cyclic number.

It is not a de Polignac number, because 20324543489 - 2⁸ = 20324543233 is a prime.

It is not a weakly prime, because it can be changed into another prime (20324543429) 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, 10162271744 + 10162271745.

It is an arithmetic number, because the mean of its divisors is an integer number (10162271745).

Almost surely, 2^20324543489 is an apocalyptic number.

It is an amenable number.

20324543489 is a deficient number, since it is larger than the sum of its proper divisors (1).

20324543489 is an equidigital number, since it uses as much as digits as its factorization.

20324543489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 20324543489 in words is "twenty billion, three hundred twenty-four million, five hundred forty-three thousand, four hundred eighty-nine".