18357161 has 8 divisors (see below), whose sum is σ = 19587744. Its totient is φ = 17143360.

The previous prime is 18357149. The next prime is 18357167. The reversal of 18357161 is 16175381.

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 18357161 - 2¹⁰ = 18356137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18357167) 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, 1895 + ... + 6348.

It is an arithmetic number, because the mean of its divisors is an integer number (2448468).

Almost surely, 2^18357161 is an apocalyptic number.

It is an amenable number.

18357161 is a deficient number, since it is larger than the sum of its proper divisors (1230583).

18357161 is a wasteful number, since it uses less digits than its factorization.

18357161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8391.

The product of its digits is 5040, while the sum is 32.

The square root of 18357161 is about 4284.5257613883. The cubic root of 18357161 is about 263.7961820257.

The spelling of 18357161 in words is "eighteen million, three hundred fifty-seven thousand, one hundred sixty-one".