20680908 has 24 divisors (see below), whose sum is σ = 51094512. Its totient is φ = 6488064.

The previous prime is 20680903. The next prime is 20680927. The reversal of 20680908 is 80908602.

It is not an unprimeable number, because it can be changed into a prime (20680901) 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, 50485 + ... + 50892.

It is an arithmetic number, because the mean of its divisors is an integer number (2128938).

Almost surely, 2^20680908 is an apocalyptic number.

It is an amenable number.

20680908 is an abundant number, since it is smaller than the sum of its proper divisors (30413604).

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

20680908 is a wasteful number, since it uses less digits than its factorization.

20680908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101401 (or 101399 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 20680908 is about 4547.6266337508. The cubic root of 20680908 is about 274.4878976486.

The spelling of 20680908 in words is "twenty million, six hundred eighty thousand, nine hundred eight".