20084171785117 has 4 divisors (see below), whose sum is σ = 21910005583776. Its totient is φ = 18258337986460.

The previous prime is 20084171785079. The next prime is 20084171785141. The reversal of 20084171785117 is 71158717148002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-20084171785117 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 (20084181785117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 912916899313 + ... + 912916899334.

It is an arithmetic number, because the mean of its divisors is an integer number (5477501395944).

Almost surely, 2^{20084171785117} is an apocalyptic number.

It is an amenable number.

20084171785117 is a deficient number, since it is larger than the sum of its proper divisors (1825833798659).

20084171785117 is a wasteful number, since it uses less digits than its factorization.

20084171785117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825833798658.

The product of its (nonzero) digits is 878080, while the sum is 52.

The spelling of 20084171785117 in words is "twenty trillion, eighty-four billion, one hundred seventy-one million, seven hundred eighty-five thousand, one hundred seventeen".