20893804 has 18 divisors (see below), whose sum is σ = 37874564. Its totient is φ = 10085040.

The previous prime is 20893777. The next prime is 20893811. The reversal of 20893804 is 40839802.

It is a self number, because there is not a number n which added to its sum of digits gives 20893804.

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 5 ways as a sum of consecutive naturals, for example, 259 + ... + 6469.

Almost surely, 2^20893804 is an apocalyptic number.

It is an amenable number.

20893804 is a deficient number, since it is larger than the sum of its proper divisors (16980760).

20893804 is a wasteful number, since it uses less digits than its factorization.

20893804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6273 (or 6242 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 20893804 is about 4570.9740756211. The cubic root of 20893804 is about 275.4265732297.

The spelling of 20893804 in words is "twenty million, eight hundred ninety-three thousand, eight hundred four".