18719008 has 96 divisors (see below), whose sum is σ = 47029248. Its totient is φ = 7123200.

The previous prime is 18718979. The next prime is 18719011. The reversal of 18719008 is 80091781.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174891 + ... + 174997.

It is an arithmetic number, because the mean of its divisors is an integer number (489888).

Almost surely, 2^18719008 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 18719008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23514624).

18719008 is an abundant number, since it is smaller than the sum of its proper divisors (28310240).

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

18719008 is a wasteful number, since it uses less digits than its factorization.

18719008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 18719008 is about 4326.5468909975. The cubic root of 18719008 is about 265.5181886218.

The spelling of 18719008 in words is "eighteen million, seven hundred nineteen thousand, eight".