20804768 has 24 divisors (see below), whose sum is σ = 41096160. Its totient is φ = 10367680.

The previous prime is 20804747. The next prime is 20804783. The reversal of 20804768 is 86740802.

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, 10583 + ... + 12393.

It is an arithmetic number, because the mean of its divisors is an integer number (1712340).

Almost surely, 2^20804768 is an apocalyptic number.

It is an amenable number.

20804768 is a deficient number, since it is larger than the sum of its proper divisors (20291392).

20804768 is a wasteful number, since it uses less digits than its factorization.

20804768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180 (or 2172 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 20804768 is about 4561.2243970232. The cubic root of 20804768 is about 275.0347856823.

The spelling of 20804768 in words is "twenty million, eight hundred four thousand, seven hundred sixty-eight".