20804984 has 16 divisors (see below), whose sum is σ = 39074400. Its totient is φ = 10385152.

The previous prime is 20804983. The next prime is 20805011. The reversal of 20804984 is 48940802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20804983) 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, 3944 + ... + 7560.

It is an arithmetic number, because the mean of its divisors is an integer number (2442150).

Almost surely, 2^20804984 is an apocalyptic number.

It is an amenable number.

20804984 is a deficient number, since it is larger than the sum of its proper divisors (18269416).

20804984 is a wasteful number, since it uses less digits than its factorization.

20804984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4342 (or 4338 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 20804984 is about 4561.2480748146. The cubic root of 20804984 is about 275.0357375043.

The spelling of 20804984 in words is "twenty million, eight hundred four thousand, nine hundred eighty-four".