17989347218 has 8 divisors (see below), whose sum is σ = 27139998348. Its totient is φ = 8942681104.

The previous prime is 17989347217. The next prime is 17989347221. The reversal of 17989347218 is 81274398971.

It can be written as a sum of positive squares in 2 ways, for example, as 17972887969 + 16459249 = 134063^2 + 4057^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×17989347218² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (17989347217) 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 3 ways as a sum of consecutive naturals, for example, 25995821 + ... + 25996512.

Almost surely, 2^17989347218 is an apocalyptic number.

17989347218 is a deficient number, since it is larger than the sum of its proper divisors (9150651130).

17989347218 is a wasteful number, since it uses less digits than its factorization.

17989347218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51992508.

The product of its digits is 6096384, while the sum is 59.

The spelling of 17989347218 in words is "seventeen billion, nine hundred eighty-nine million, three hundred forty-seven thousand, two hundred eighteen".