16182189 has 6 divisors (see below), whose sum is σ = 23374286. Its totient is φ = 10788120.

The previous prime is 16182161. The next prime is 16182191. The reversal of 16182189 is 98128161.

It can be written as a sum of positive squares in only one way, i.e., 11594025 + 4588164 = 3405^2 + 2142^2 .

It is not a de Polignac number, because 16182189 - 2⁵ = 16182157 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16182109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 899002 + ... + 899019.

Almost surely, 2^16182189 is an apocalyptic number.

It is an amenable number.

16182189 is a deficient number, since it is larger than the sum of its proper divisors (7192097).

16182189 is a wasteful number, since it uses less digits than its factorization.

16182189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798027 (or 1798024 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 16182189 is about 4022.7091617466. The cubic root of 16182189 is about 252.9370348498.

The spelling of 16182189 in words is "sixteen million, one hundred eighty-two thousand, one hundred eighty-nine".