18389547158 has 4 divisors (see below), whose sum is σ = 27584320740. Its totient is φ = 9194773578.

The previous prime is 18389547089. The next prime is 18389547191. The reversal of 18389547158 is 85174598381.

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

It is a junction number, because it is equal to n+sod(n) for n = 18389547097 and 18389547106.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4597386788 + ... + 4597386791.

It is an arithmetic number, because the mean of its divisors is an integer number (6896080185).

Almost surely, 2^18389547158 is an apocalyptic number.

18389547158 is a deficient number, since it is larger than the sum of its proper divisors (9194773582).

18389547158 is an equidigital number, since it uses as much as digits as its factorization.

18389547158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9194773581.

The product of its digits is 9676800, while the sum is 59.

The spelling of 18389547158 in words is "eighteen billion, three hundred eighty-nine million, five hundred forty-seven thousand, one hundred fifty-eight".