18357145 has 8 divisors (see below), whose sum is σ = 22788360. Its totient is φ = 14179200.

The previous prime is 18357113. The next prime is 18357149. The reversal of 18357145 is 54175381.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6885376 + 11471769 = 2624^2 + 3387^2 .

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

It is not a de Polignac number, because 18357145 - 2⁵ = 18357113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18357145.

It is not an unprimeable number, because it can be changed into a prime (18357149) 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, 63156 + ... + 63445.

It is an arithmetic number, because the mean of its divisors is an integer number (2848545).

Almost surely, 2^18357145 is an apocalyptic number.

It is an amenable number.

18357145 is a deficient number, since it is larger than the sum of its proper divisors (4431215).

18357145 is a wasteful number, since it uses less digits than its factorization.

18357145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126635.

The product of its digits is 16800, while the sum is 34.

The square root of 18357145 is about 4284.5238942034. The cubic root of 18357145 is about 263.7961053846.

The spelling of 18357145 in words is "eighteen million, three hundred fifty-seven thousand, one hundred forty-five".