18116941 has 4 divisors (see below), whose sum is σ = 18127900. Its totient is φ = 18105984.

The previous prime is 18116933. The next prime is 18116963. The reversal of 18116941 is 14961181.

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: 14961181 = 47 ⋅318323.

It can be written as a sum of positive squares in 2 ways, for example, as 10017225 + 8099716 = 3165^2 + 2846^2 .

It is a cyclic number.

It is not a de Polignac number, because 18116941 - 2³ = 18116933 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 (18116911) 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, 2436 + ... + 6493.

It is an arithmetic number, because the mean of its divisors is an integer number (4531975).

Almost surely, 2^18116941 is an apocalyptic number.

It is an amenable number.

18116941 is a deficient number, since it is larger than the sum of its proper divisors (10959).

18116941 is an equidigital number, since it uses as much as digits as its factorization.

18116941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10958.

The product of its digits is 1728, while the sum is 31.

The square root of 18116941 is about 4256.4000046988. The cubic root of 18116941 is about 262.6404557476.

The spelling of 18116941 in words is "eighteen million, one hundred sixteen thousand, nine hundred forty-one".