18980008 has 8 divisors (see below), whose sum is σ = 35587530. Its totient is φ = 9490000.

The previous prime is 18979999. The next prime is 18980011. The reversal of 18980008 is 80008981.

It can be written as a sum of positive squares in only one way, i.e., 16957924 + 2022084 = 4118^2 + 1422^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1186243 + ... + 1186258.

Almost surely, 2^18980008 is an apocalyptic number.

It is an amenable number.

18980008 is a deficient number, since it is larger than the sum of its proper divisors (16607522).

18980008 is a wasteful number, since it uses less digits than its factorization.

18980008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2372507 (or 2372503 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 18980008 is about 4356.6051003046. The cubic root of 18980008 is about 266.7465413505.

Adding to 18980008 its reverse (80008981), we get a palindrome (98988989).

The spelling of 18980008 in words is "eighteen million, nine hundred eighty thousand, eight".