19936589 has 2 divisors, whose sum is σ = 19936590. Its totient is φ = 19936588.

The previous prime is 19936573. The next prime is 19936591. The reversal of 19936589 is 98563991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14760964 + 5175625 = 3842^2 + 2275^2 .

It is a cyclic number.

It is not a de Polignac number, because 19936589 - 2⁴ = 19936573 is a prime.

Together with 19936591, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19935589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9968294 + 9968295.

It is an arithmetic number, because the mean of its divisors is an integer number (9968295).

Almost surely, 2^19936589 is an apocalyptic number.

It is an amenable number.

19936589 is a deficient number, since it is larger than the sum of its proper divisors (1).

19936589 is an equidigital number, since it uses as much as digits as its factorization.

19936589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 524880, while the sum is 50.

The square root of 19936589 is about 4465.0407612921. The cubic root of 19936589 is about 271.1545847166.

The spelling of 19936589 in words is "nineteen million, nine hundred thirty-six thousand, five hundred eighty-nine".