20397607009589 has 2 divisors, whose sum is σ = 20397607009590. Its totient is φ = 20397607009588.

The previous prime is 20397607009441. The next prime is 20397607009649. The reversal of 20397607009589 is 98590070679302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16085048720689 + 4312558288900 = 4010617^2 + 2076670^2 .

It is a cyclic number.

It is not a de Polignac number, because 20397607009589 - 2²⁴ = 20397590232373 is a prime.

It is a super-3 number, since 3×20397607009589³ (a number of 41 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20397607003589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10198803504794 + 10198803504795.

It is an arithmetic number, because the mean of its divisors is an integer number (10198803504795).

Almost surely, 2^{20397607009589} is an apocalyptic number.

It is an amenable number.

20397607009589 is a deficient number, since it is larger than the sum of its proper divisors (1).

20397607009589 is an equidigital number, since it uses as much as digits as its factorization.

20397607009589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51438240, while the sum is 65.

The spelling of 20397607009589 in words is "twenty trillion, three hundred ninety-seven billion, six hundred seven million, nine thousand, five hundred eighty-nine".