18084972017 has 4 divisors (see below), whose sum is σ = 20668539456. Its totient is φ = 15501404580.

The previous prime is 18084971987. The next prime is 18084972047. The reversal of 18084972017 is 71027948081.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (18084971987) and next prime (18084972047).

It is a cyclic number.

It is not a de Polignac number, because 18084972017 - 2⁶ = 18084971953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18084972047) 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, 1291783709 + ... + 1291783722.

It is an arithmetic number, because the mean of its divisors is an integer number (5167134864).

Almost surely, 2^18084972017 is an apocalyptic number.

It is an amenable number.

18084972017 is a deficient number, since it is larger than the sum of its proper divisors (2583567439).

18084972017 is an equidigital number, since it uses as much as digits as its factorization.

18084972017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583567438.

The product of its (nonzero) digits is 225792, while the sum is 47.

The spelling of 18084972017 in words is "eighteen billion, eighty-four million, nine hundred seventy-two thousand, seventeen".