20085184961 has 8 divisors (see below), whose sum is σ = 20187834024. Its totient is φ = 19982753280.

The previous prime is 20085184949. The next prime is 20085185017. The reversal of 20085184961 is 16948158002.

It can be written as a sum of positive squares in 4 ways, for example, as 2735290000 + 17349894961 = 52300^2 + 131719^2 .

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 20085184961 - 2³⁰ = 19011443137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20085189961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132551 + ... + 240291.

It is an arithmetic number, because the mean of its divisors is an integer number (2523479253).

Almost surely, 2^20085184961 is an apocalyptic number.

It is an amenable number.

20085184961 is a deficient number, since it is larger than the sum of its proper divisors (102649063).

20085184961 is a wasteful number, since it uses less digits than its factorization.

20085184961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108691.

The product of its (nonzero) digits is 138240, while the sum is 44.

The spelling of 20085184961 in words is "twenty billion, eighty-five million, one hundred eighty-four thousand, nine hundred sixty-one".