18979908 has 24 divisors (see below), whose sum is σ = 44849280. Its totient is φ = 6246240.

The previous prime is 18979901. The next prime is 18979931. The reversal of 18979908 is 80997981.

It is not an unprimeable number, because it can be changed into a prime (18979901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9063 + ... + 10958.

It is an arithmetic number, because the mean of its divisors is an integer number (1868720).

Almost surely, 2^18979908 is an apocalyptic number.

It is an amenable number.

18979908 is an abundant number, since it is smaller than the sum of its proper divisors (25869372).

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

18979908 is a wasteful number, since it uses less digits than its factorization.

18979908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20107 (or 20105 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 51.

The square root of 18979908 is about 4356.5936234632. The cubic root of 18979908 is about 266.7460728804.

The spelling of 18979908 in words is "eighteen million, nine hundred seventy-nine thousand, nine hundred eight".