20804404 has 6 divisors (see below), whose sum is σ = 36407714. Its totient is φ = 10402200.

The previous prime is 20804401. The next prime is 20804431. The reversal of 20804404 is 40440802.

It can be written as a sum of positive squares in only one way, i.e., 15523600 + 5280804 = 3940^2 + 2298^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20804401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2600547 + ... + 2600554.

Almost surely, 2^20804404 is an apocalyptic number.

It is an amenable number.

20804404 is a deficient number, since it is larger than the sum of its proper divisors (15603310).

20804404 is a wasteful number, since it uses less digits than its factorization.

20804404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5201105 (or 5201103 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 20804404 is about 4561.1844952819. The cubic root of 20804404 is about 275.0331816710.

The spelling of 20804404 in words is "twenty million, eight hundred four thousand, four hundred four".