18812008 has 8 divisors (see below), whose sum is σ = 35272530. Its totient is φ = 9406000.

The previous prime is 18811997. The next prime is 18812051. The reversal of 18812008 is 80021881.

It can be written as a sum of positive squares in only one way, i.e., 15194404 + 3617604 = 3898^2 + 1902^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1175743 + ... + 1175758.

Almost surely, 2^18812008 is an apocalyptic number.

It is an amenable number.

18812008 is a deficient number, since it is larger than the sum of its proper divisors (16460522).

18812008 is a wasteful number, since it uses less digits than its factorization.

18812008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2351507 (or 2351503 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 18812008 is about 4337.2811760364. The cubic root of 18812008 is about 265.9571793057.

Adding to 18812008 its reverse (80021881), we get a palindrome (98833889).

The spelling of 18812008 in words is "eighteen million, eight hundred twelve thousand, eight".