18806208 has 56 divisors (see below), whose sum is σ = 50993040. Its totient is φ = 6113280.

The previous prime is 18806197. The next prime is 18806209. The reversal of 18806208 is 80260881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18806209) 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 7 ways as a sum of consecutive naturals, for example, 6678 + ... + 9066.

It is an arithmetic number, because the mean of its divisors is an integer number (910590).

Almost surely, 2^18806208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18806208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25496520).

18806208 is an abundant number, since it is smaller than the sum of its proper divisors (32186832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18806208 is a wasteful number, since it uses less digits than its factorization.

18806208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2445 (or 2435 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 18806208 is about 4336.6125028644. The cubic root of 18806208 is about 265.9298437479.

The spelling of 18806208 in words is "eighteen million, eight hundred six thousand, two hundred eight".