18806008 has 32 divisors (see below), whose sum is σ = 38198160. Its totient is φ = 8628480.

The previous prime is 18805951. The next prime is 18806077. The reversal of 18806008 is 80060881.

It is a super-3 number, since 3×18806008³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21516 + ... + 22372.

Almost surely, 2^18806008 is an apocalyptic number.

18806008 is the 2743-rd heptagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18806008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19099080).

18806008 is an abundant number, since it is smaller than the sum of its proper divisors (19392152).

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

18806008 is a wasteful number, since it uses less digits than its factorization.

18806008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087 (or 1083 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 18806008 is about 4336.5894433299. The cubic root of 18806008 is about 265.9289010422.

Adding to 18806008 its reverse (80060881), we get a palindrome (98866889).

The spelling of 18806008 in words is "eighteen million, eight hundred six thousand, eight".