18809108 has 6 divisors (see below), whose sum is σ = 32915946. Its totient is φ = 9404552.

The previous prime is 18809099. The next prime is 18809113. The reversal of 18809108 is 80190881.

It can be written as a sum of positive squares in only one way, i.e., 14760964 + 4048144 = 3842^2 + 2012^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2351135 + ... + 2351142.

It is an arithmetic number, because the mean of its divisors is an integer number (5485991).

Almost surely, 2^18809108 is an apocalyptic number.

It is an amenable number.

18809108 is a deficient number, since it is larger than the sum of its proper divisors (14106838).

18809108 is a wasteful number, since it uses less digits than its factorization.

18809108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4702281 (or 4702279 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 18809108 is about 4336.9468523375. The cubic root of 18809108 is about 265.9435122292.

Adding to 18809108 its reverse (80190881), we get a palindrome (98999989).

The spelling of 18809108 in words is "eighteen million, eight hundred nine thousand, one hundred eight".