17986728359 has 4 divisors (see below), whose sum is σ = 17997922704. Its totient is φ = 17975534016.

The previous prime is 17986728337. The next prime is 17986728407. The reversal of 17986728359 is 95382768971.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 17986728359 - 2³² = 13691761063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 17986728295 and 17986728304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17986728959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5594762 + ... + 5597975.

It is an arithmetic number, because the mean of its divisors is an integer number (4499480676).

Almost surely, 2^17986728359 is an apocalyptic number.

17986728359 is a deficient number, since it is larger than the sum of its proper divisors (11194345).

17986728359 is a wasteful number, since it uses less digits than its factorization.

17986728359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11194344.

The product of its digits is 45722880, while the sum is 65.

The spelling of 17986728359 in words is "seventeen billion, nine hundred eighty-six million, seven hundred twenty-eight thousand, three hundred fifty-nine".