20550072575509 has 8 divisors (see below), whose sum is σ = 20856977405280. Its totient is φ = 20243173255536.

The previous prime is 20550072575507. The next prime is 20550072575519. The reversal of 20550072575509 is 90557527005502.

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 20550072575509 - 2¹ = 20550072575507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20550072575507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6468987 + ... + 9107575.

It is an arithmetic number, because the mean of its divisors is an integer number (2607122175660).

Almost surely, 2^{20550072575509} is an apocalyptic number.

It is an amenable number.

20550072575509 is a deficient number, since it is larger than the sum of its proper divisors (306904829771).

20550072575509 is a wasteful number, since it uses less digits than its factorization.

20550072575509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754899.

The product of its (nonzero) digits is 5512500, while the sum is 52.

The spelling of 20550072575509 in words is "twenty trillion, five hundred fifty billion, seventy-two million, five hundred seventy-five thousand, five hundred nine".