18357 has 8 divisors (see below), whose sum is σ = 25440. Its totient is φ = 11760.

The previous prime is 18353. The next prime is 18367. The reversal of 18357 is 75381.

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

It is not a de Polignac number, because 18357 - 2² = 18353 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18353) 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, 19 + ... + 192.

It is an arithmetic number, because the mean of its divisors is an integer number (3180).

2¹⁸³⁵⁷ is an apocalyptic number.

It is an amenable number.

18357 is a deficient number, since it is larger than the sum of its proper divisors (7083).

18357 is a wasteful number, since it uses less digits than its factorization.

18357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243.

The product of its digits is 840, while the sum is 24.

The square root of 18357 is about 135.4880068493. The cubic root of 18357 is about 26.3795410822.

Adding to 18357 its sum of digits (24), we get a palindrome (18381).

The spelling of 18357 in words is "eighteen thousand, three hundred fifty-seven".