20740768589 has 2 divisors, whose sum is σ = 20740768590. Its totient is φ = 20740768588.

The previous prime is 20740768583. The next prime is 20740768681. The reversal of 20740768589 is 98586704702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20564994025 + 175774564 = 143405^2 + 13258^2 .

It is a cyclic number.

It is not a de Polignac number, because 20740768589 - 2²⁴ = 20723991373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20740768583) 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, 10370384294 + 10370384295.

It is an arithmetic number, because the mean of its divisors is an integer number (10370384295).

Almost surely, 2^20740768589 is an apocalyptic number.

It is an amenable number.

20740768589 is a deficient number, since it is larger than the sum of its proper divisors (1).

20740768589 is an equidigital number, since it uses as much as digits as its factorization.

20740768589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6773760, while the sum is 56.

The spelling of 20740768589 in words is "twenty billion, seven hundred forty million, seven hundred sixty-eight thousand, five hundred eighty-nine".