18133257 has 8 divisors (see below), whose sum is σ = 24247584. Its totient is φ = 12053888.

The previous prime is 18133217. The next prime is 18133279. The reversal of 18133257 is 75233181.

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 18133257 - 2¹¹ = 18131209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18133217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7503 + ... + 9620.

It is an arithmetic number, because the mean of its divisors is an integer number (3030948).

Almost surely, 2^18133257 is an apocalyptic number.

It is an amenable number.

18133257 is a deficient number, since it is larger than the sum of its proper divisors (6114327).

18133257 is a wasteful number, since it uses less digits than its factorization.

18133257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17479.

The product of its digits is 5040, while the sum is 30.

The square root of 18133257 is about 4258.3162165344. The cubic root of 18133257 is about 262.7192761897.

The spelling of 18133257 in words is "eighteen million, one hundred thirty-three thousand, two hundred fifty-seven".