20013773516489 has 2 divisors, whose sum is σ = 20013773516490. Its totient is φ = 20013773516488.

The previous prime is 20013773516483. The next prime is 20013773516509. The reversal of 20013773516489 is 98461537731002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16051305062464 + 3962468454025 = 4006408^2 + 1990595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20013773516489 is a prime.

It is a super-2 number, since 2×20013773516489² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20013773516483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006886758244 + 10006886758245.

It is an arithmetic number, because the mean of its divisors is an integer number (10006886758245).

It is a 1-persistent number, because it is pandigital, but 2⋅20013773516489 = 40027547032978 is not.

Almost surely, 2^{20013773516489} is an apocalyptic number.

It is an amenable number.

20013773516489 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013773516489 is an equidigital number, since it uses as much as digits as its factorization.

20013773516489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 20013773516489 in words is "twenty trillion, thirteen billion, seven hundred seventy-three million, five hundred sixteen thousand, four hundred eighty-nine".