20852808 has 16 divisors (see below), whose sum is σ = 52132080. Its totient is φ = 6950928.

The previous prime is 20852803. The next prime is 20852809. The reversal of 20852808 is 80825802.

It is not an unprimeable number, because it can be changed into a prime (20852803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434410 + ... + 434457.

It is an arithmetic number, because the mean of its divisors is an integer number (3258255).

Almost surely, 2^20852808 is an apocalyptic number.

It is an amenable number.

20852808 is an abundant number, since it is smaller than the sum of its proper divisors (31279272).

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

20852808 is a wasteful number, since it uses less digits than its factorization.

20852808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868876 (or 868872 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 33.

The square root of 20852808 is about 4566.4874904022. The cubic root of 20852808 is about 275.2463159494.

The spelling of 20852808 in words is "twenty million, eight hundred fifty-two thousand, eight hundred eight".