20186852017 has 4 divisors (see below), whose sum is σ = 20340950256. Its totient is φ = 20032753780.

The previous prime is 20186852009. The next prime is 20186852047. The reversal of 20186852017 is 71025868102.

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 cyclic number.

It is not a de Polignac number, because 20186852017 - 2³ = 20186852009 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20186852047) 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 3 ways as a sum of consecutive naturals, for example, 77048923 + ... + 77049184.

It is an arithmetic number, because the mean of its divisors is an integer number (5085237564).

Almost surely, 2^20186852017 is an apocalyptic number.

It is an amenable number.

20186852017 is a deficient number, since it is larger than the sum of its proper divisors (154098239).

20186852017 is a wasteful number, since it uses less digits than its factorization.

20186852017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154098238.

The product of its (nonzero) digits is 53760, while the sum is 40.

The spelling of 20186852017 in words is "twenty billion, one hundred eighty-six million, eight hundred fifty-two thousand, seventeen".