18534841 has 4 divisors (see below), whose sum is σ = 19960612. Its totient is φ = 17109072.

The previous prime is 18534833. The next prime is 18534847. The reversal of 18534841 is 14843581.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12673600 + 5861241 = 3560^2 + 2421^2 .

It is a cyclic number.

It is not a de Polignac number, because 18534841 - 2³ = 18534833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18534797 and 18534806.

It is not an unprimeable number, because it can be changed into a prime (18534847) 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, 712866 + ... + 712891.

It is an arithmetic number, because the mean of its divisors is an integer number (4990153).

Almost surely, 2^18534841 is an apocalyptic number.

It is an amenable number.

18534841 is a deficient number, since it is larger than the sum of its proper divisors (1425771).

18534841 is a wasteful number, since it uses less digits than its factorization.

18534841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425770.

The product of its digits is 15360, while the sum is 34.

The square root of 18534841 is about 4305.2109123712. The cubic root of 18534841 is about 264.6445501410.

The spelling of 18534841 in words is "eighteen million, five hundred thirty-four thousand, eight hundred forty-one".