20131108 has 24 divisors (see below), whose sum is σ = 38091200. Its totient is φ = 9276768.

The previous prime is 20131103. The next prime is 20131109. The reversal of 20131108 is 80113102.

It is a junction number, because it is equal to n+sod(n) for n = 20131091 and 20131100.

It is not an unprimeable number, because it can be changed into a prime (20131103) 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 7 ways as a sum of consecutive naturals, for example, 768 + ... + 6391.

Almost surely, 2^20131108 is an apocalyptic number.

It is an amenable number.

20131108 is a deficient number, since it is larger than the sum of its proper divisors (17960092).

20131108 is a wasteful number, since it uses less digits than its factorization.

20131108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7219 (or 7217 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 20131108 is about 4486.7703306499. The cubic root of 20131108 is about 272.0336067184.

The spelling of 20131108 in words is "twenty million, one hundred thirty-one thousand, one hundred eight".