20650875809 has 8 divisors (see below), whose sum is σ = 20964549600. Its totient is φ = 20337362496.

The previous prime is 20650875803. The next prime is 20650875811. The reversal of 20650875809 is 90857805602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20650875809 - 2⁴ = 20650875793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20650875803) 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 7 ways as a sum of consecutive naturals, for example, 233222 + ... + 309344.

It is an arithmetic number, because the mean of its divisors is an integer number (2620568700).

Almost surely, 2^20650875809 is an apocalyptic number.

It is an amenable number.

20650875809 is a deficient number, since it is larger than the sum of its proper divisors (313673791).

20650875809 is an equidigital number, since it uses as much as digits as its factorization.

20650875809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80239.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 20650875809 in words is "twenty billion, six hundred fifty million, eight hundred seventy-five thousand, eight hundred nine".