20684908 has 12 divisors (see below), whose sum is σ = 36233680. Its totient is φ = 10332432.

The previous prime is 20684899. The next prime is 20684929. The reversal of 20684908 is 80948602.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4033 + ... + 7591.

Almost surely, 2^20684908 is an apocalyptic number.

It is an amenable number.

20684908 is a deficient number, since it is larger than the sum of its proper divisors (15548772).

20684908 is a wasteful number, since it uses less digits than its factorization.

20684908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5016 (or 5014 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 20684908 is about 4548.0664023297. The cubic root of 20684908 is about 274.5055932097.

The spelling of 20684908 in words is "twenty million, six hundred eighty-four thousand, nine hundred eight".