21532205056589 has 2 divisors, whose sum is σ = 21532205056590. Its totient is φ = 21532205056588.

The previous prime is 21532205056553. The next prime is 21532205056657. The reversal of 21532205056589 is 98565050223512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20999837823364 + 532367233225 = 4582558^2 + 729635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21532205056589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21532205056589.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21532205055589) 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, 10766102528294 + 10766102528295.

It is an arithmetic number, because the mean of its divisors is an integer number (10766102528295).

Almost surely, 2^{21532205056589} is an apocalyptic number.

It is an amenable number.

21532205056589 is a deficient number, since it is larger than the sum of its proper divisors (1).

21532205056589 is an equidigital number, since it uses as much as digits as its factorization.

21532205056589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480000, while the sum is 53.

The spelling of 21532205056589 in words is "twenty-one trillion, five hundred thirty-two billion, two hundred five million, fifty-six thousand, five hundred eighty-nine".