20920908 has 24 divisors (see below), whose sum is σ = 50391040. Its totient is φ = 6748560.

The previous prime is 20920901. The next prime is 20920909. The reversal of 20920908 is 80902902.

It is not an unprimeable number, because it can be changed into a prime (20920901) 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, 27748 + ... + 28491.

Almost surely, 2^20920908 is an apocalyptic number.

It is an amenable number.

20920908 is an abundant number, since it is smaller than the sum of its proper divisors (29470132).

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

20920908 is a wasteful number, since it uses less digits than its factorization.

20920908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56277 (or 56275 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 20920908 is about 4573.9379095042. The cubic root of 20920908 is about 275.5456186680.

The spelling of 20920908 in words is "twenty million, nine hundred twenty thousand, nine hundred eight".