20704800 has 72 divisors (see below), whose sum is σ = 67401936. Its totient is φ = 5520640.

The previous prime is 20704787. The next prime is 20704819. The reversal of 20704800 is 840702.

It is a happy 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 11 ways as a sum of consecutive naturals, for example, 1914 + ... + 6713.

It is an arithmetic number, because the mean of its divisors is an integer number (936138).

Almost surely, 2^20704800 is an apocalyptic number.

20704800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20704800 is an abundant number, since it is smaller than the sum of its proper divisors (46697136).

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

20704800 is a wasteful number, since it uses less digits than its factorization.

20704800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8650 (or 8637 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 20704800 is about 4550.2527402332. The cubic root of 20704800 is about 274.5935593702.

The spelling of 20704800 in words is "twenty million, seven hundred four thousand, eight hundred".