18074191 has 4 divisors (see below), whose sum is σ = 18084952. Its totient is φ = 18063432.

The previous prime is 18074141. The next prime is 18074227. The reversal of 18074191 is 19147081.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 19147081 = 2969 ⋅6449.

It is a cyclic number.

It is not a de Polignac number, because 18074191 - 2¹⁷ = 17943119 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 (18074141) 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 3 ways as a sum of consecutive naturals, for example, 2256 + ... + 6421.

It is an arithmetic number, because the mean of its divisors is an integer number (4521238).

Almost surely, 2^18074191 is an apocalyptic number.

18074191 is a deficient number, since it is larger than the sum of its proper divisors (10761).

18074191 is an equidigital number, since it uses as much as digits as its factorization.

18074191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10760.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 18074191 is about 4251.3751892770. The cubic root of 18074191 is about 262.4337114552.

The spelling of 18074191 in words is "eighteen million, seventy-four thousand, one hundred ninety-one".