18103908 has 12 divisors (see below), whose sum is σ = 42242480. Its totient is φ = 6034632.

The previous prime is 18103879. The next prime is 18103909. The reversal of 18103908 is 80930181.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (18103909) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 754318 + ... + 754341.

Almost surely, 2^18103908 is an apocalyptic number.

It is an amenable number.

18103908 is an abundant number, since it is smaller than the sum of its proper divisors (24138572).

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

18103908 is a wasteful number, since it uses less digits than its factorization.

18103908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508666 (or 1508664 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 18103908 is about 4254.8687406311. The cubic root of 18103908 is about 262.5774610400.

The spelling of 18103908 in words is "eighteen million, one hundred three thousand, nine hundred eight".