18347992689 has 8 divisors (see below), whose sum is σ = 26345835712. Its totient is φ = 11291072400.

The previous prime is 18347992667. The next prime is 18347992709. The reversal of 18347992689 is 98629974381.

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

It is not a de Polignac number, because 18347992689 - 2¹¹ = 18347990641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18347992639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235230637 + ... + 235230714.

It is an arithmetic number, because the mean of its divisors is an integer number (3293229464).

Almost surely, 2^18347992689 is an apocalyptic number.

It is an amenable number.

18347992689 is a deficient number, since it is larger than the sum of its proper divisors (7997843023).

18347992689 is a wasteful number, since it uses less digits than its factorization.

18347992689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470461367.

The product of its digits is 47029248, while the sum is 66.

The spelling of 18347992689 in words is "eighteen billion, three hundred forty-seven million, nine hundred ninety-two thousand, six hundred eighty-nine".