18187941 has 8 divisors (see below), whose sum is σ = 24270304. Its totient is φ = 12115440.

The previous prime is 18187937. The next prime is 18187973. The reversal of 18187941 is 14978181.

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

It is not a de Polignac number, because 18187941 - 2² = 18187937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18187941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18187931) 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 7 ways as a sum of consecutive naturals, for example, 5835 + ... + 8391.

It is an arithmetic number, because the mean of its divisors is an integer number (3033788).

Almost surely, 2^18187941 is an apocalyptic number.

It is an amenable number.

18187941 is a deficient number, since it is larger than the sum of its proper divisors (6082363).

18187941 is a wasteful number, since it uses less digits than its factorization.

18187941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4931.

The product of its digits is 16128, while the sum is 39.

The square root of 18187941 is about 4264.7322307502. The cubic root of 18187941 is about 262.9831030989.

The spelling of 18187941 in words is "eighteen million, one hundred eighty-seven thousand, nine hundred forty-one".