17974679917 has 8 divisors (see below), whose sum is σ = 18087409080. Its totient is φ = 17862255360.

The previous prime is 17974679911. The next prime is 17974679923. The reversal of 17974679917 is 71997647971.

It is an interprime number because it is at equal distance from previous prime (17974679911) and next prime (17974679923).

It can be written as a sum of positive squares in 4 ways, for example, as 5542206916 + 12432473001 = 74446^2 + 111501^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 17974679917 - 2¹¹ = 17974677869 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 (17974679911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42817 + ... + 194377.

It is an arithmetic number, because the mean of its divisors is an integer number (2260926135).

Almost surely, 2^17974679917 is an apocalyptic number.

It is an amenable number.

17974679917 is a deficient number, since it is larger than the sum of its proper divisors (112729163).

17974679917 is a wasteful number, since it uses less digits than its factorization.

17974679917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152303.

The product of its digits is 42007896, while the sum is 67.

The spelling of 17974679917 in words is "seventeen billion, nine hundred seventy-four million, six hundred seventy-nine thousand, nine hundred seventeen".