20808792 has 32 divisors (see below), whose sum is σ = 57802800. Its totient is φ = 6936192.

The previous prime is 20808787. The next prime is 20808803. The reversal of 20808792 is 29780802.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47953 + ... + 48384.

Almost surely, 2^20808792 is an apocalyptic number.

It is an amenable number.

20808792 is an abundant number, since it is smaller than the sum of its proper divisors (36994008).

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

20808792 is a wasteful number, since it uses less digits than its factorization.

20808792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96352 (or 96342 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 20808792 is about 4561.6654853244. The cubic root of 20808792 is about 275.0525166920.

The spelling of 20808792 in words is "twenty million, eight hundred eight thousand, seven hundred ninety-two".