18073191 has 8 divisors (see below), whose sum is σ = 24154240. Its totient is φ = 12020472.

The previous prime is 18073189. The next prime is 18073207. The reversal of 18073191 is 19137081.

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

It is not a de Polignac number, because 18073191 - 2¹ = 18073189 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 (18073151) 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, 5545 + ... + 8178.

It is an arithmetic number, because the mean of its divisors is an integer number (3019280).

Almost surely, 2^18073191 is an apocalyptic number.

18073191 is a deficient number, since it is larger than the sum of its proper divisors (6081049).

18073191 is a wasteful number, since it uses less digits than its factorization.

18073191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14165.

The product of its (nonzero) digits is 1512, while the sum is 30.

The square root of 18073191 is about 4251.2575786466. The cubic root of 18073191 is about 262.4288714313.

The spelling of 18073191 in words is "eighteen million, seventy-three thousand, one hundred ninety-one".