18852289 has 4 divisors (see below), whose sum is σ = 18875860. Its totient is φ = 18828720.

The previous prime is 18852287. The next prime is 18852293. The reversal of 18852289 is 98225881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5602689 + 13249600 = 2367^2 + 3640^2 .

It is a cyclic number.

It is not a de Polignac number, because 18852289 - 2¹ = 18852287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18852283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10542 + ... + 12199.

It is an arithmetic number, because the mean of its divisors is an integer number (4718965).

Almost surely, 2^18852289 is an apocalyptic number.

It is an amenable number.

18852289 is a deficient number, since it is larger than the sum of its proper divisors (23571).

18852289 is an equidigital number, since it uses as much as digits as its factorization.

18852289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23570.

The product of its digits is 92160, while the sum is 43.

The square root of 18852289 is about 4341.9222701472. The cubic root of 18852289 is about 266.1468699161.

The spelling of 18852289 in words is "eighteen million, eight hundred fifty-two thousand, two hundred eighty-nine".