18049291 has 8 divisors (see below), whose sum is σ = 20581344. Its totient is φ = 15680640.

The previous prime is 18049279. The next prime is 18049313. The reversal of 18049291 is 19294081.

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

It is a cyclic number.

It is not a de Polignac number, because 18049291 - 2¹¹ = 18047243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18049231) 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, 40615 + ... + 41056.

It is an arithmetic number, because the mean of its divisors is an integer number (2572668).

Almost surely, 2^18049291 is an apocalyptic number.

18049291 is a deficient number, since it is larger than the sum of its proper divisors (2532053).

18049291 is a wasteful number, since it uses less digits than its factorization.

18049291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81701.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 18049291 is about 4248.4457157883. The cubic root of 18049291 is about 262.3131416969.

The spelling of 18049291 in words is "eighteen million, forty-nine thousand, two hundred ninety-one".