17982272217 has 32 divisors (see below), whose sum is σ = 29555269632. Its totient is φ = 9470401344.

The previous prime is 17982272213. The next prime is 17982272323. The reversal of 17982272217 is 71227228971.

It is a happy number.

It is not a de Polignac number, because 17982272217 - 2² = 17982272213 is a prime.

It is a super-2 number, since 2×17982272217² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (17982272213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125728 + ... + 227534.

It is an arithmetic number, because the mean of its divisors is an integer number (923602176).

Almost surely, 2^17982272217 is an apocalyptic number.

It is an amenable number.

17982272217 is a deficient number, since it is larger than the sum of its proper divisors (11572997415).

17982272217 is a wasteful number, since it uses less digits than its factorization.

17982272217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102477.

The product of its digits is 395136, while the sum is 48.

The spelling of 17982272217 in words is "seventeen billion, nine hundred eighty-two million, two hundred seventy-two thousand, two hundred seventeen".