18182441 has 4 divisors (see below), whose sum is σ = 18210132. Its totient is φ = 18154752.

The previous prime is 18182419. The next prime is 18182447. The reversal of 18182441 is 14428181.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14428181 = 613 ⋅23537.

It can be written as a sum of positive squares in 2 ways, for example, as 13249600 + 4932841 = 3640^2 + 2221^2 .

It is a cyclic number.

It is not a de Polignac number, because 18182441 - 2⁶ = 18182377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18182447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12836 + ... + 14181.

It is an arithmetic number, because the mean of its divisors is an integer number (4552533).

Almost surely, 2^18182441 is an apocalyptic number.

It is an amenable number.

18182441 is a deficient number, since it is larger than the sum of its proper divisors (27691).

18182441 is an equidigital number, since it uses as much as digits as its factorization.

18182441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27690.

The product of its digits is 2048, while the sum is 29.

The square root of 18182441 is about 4264.0873583922. The cubic root of 18182441 is about 262.9565918904.

The spelling of 18182441 in words is "eighteen million, one hundred eighty-two thousand, four hundred forty-one".