20908912 has 20 divisors (see below), whose sum is σ = 42894576. Its totient is φ = 9839360.

The previous prime is 20908907. The next prime is 20908931. The reversal of 20908912 is 21980902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38164 + ... + 38707.

Almost surely, 2^20908912 is an apocalyptic number.

It is an amenable number.

20908912 is an abundant number, since it is smaller than the sum of its proper divisors (21985664).

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

20908912 is a wasteful number, since it uses less digits than its factorization.

20908912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76896 (or 76890 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 20908912 is about 4572.6263787893. The cubic root of 20908912 is about 275.4929428596.

The spelling of 20908912 in words is "twenty million, nine hundred eight thousand, nine hundred twelve".