20580989409 has 40 divisors (see below), whose sum is σ = 32093285928. Its totient is φ = 13130864640.

The previous prime is 20580989371. The next prime is 20580989413. The reversal of 20580989409 is 90498908502.

It can be written as a sum of positive squares in 4 ways, for example, as 3058643025 + 17522346384 = 55305^2 + 132372^2 .

It is not a de Polignac number, because 20580989409 - 2⁷ = 20580989281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20580989419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 126529 + ... + 239105.

Almost surely, 2^20580989409 is an apocalyptic number.

It is an amenable number.

20580989409 is a deficient number, since it is larger than the sum of its proper divisors (11512296519).

20580989409 is a wasteful number, since it uses less digits than its factorization.

20580989409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112687 (or 112678 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 20580989409 in words is "twenty billion, five hundred eighty million, nine hundred eighty-nine thousand, four hundred nine".