20018575175809 has 8 divisors (see below), whose sum is σ = 22878422804160. Its totient is φ = 17158740341136.

The previous prime is 20018575175789. The next prime is 20018575175849. The reversal of 20018575175809 is 90857157581002.

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 20018575175809 - 2¹⁷ = 20018575044737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20018575175849) 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, 428802 + ... + 6342004.

It is an arithmetic number, because the mean of its divisors is an integer number (2859802850520).

Almost surely, 2^{20018575175809} is an apocalyptic number.

It is an amenable number.

20018575175809 is a deficient number, since it is larger than the sum of its proper divisors (2859847628351).

20018575175809 is an equidigital number, since it uses as much as digits as its factorization.

20018575175809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6396839.

The product of its (nonzero) digits is 7056000, while the sum is 58.

The spelling of 20018575175809 in words is "twenty trillion, eighteen billion, five hundred seventy-five million, one hundred seventy-five thousand, eight hundred nine".