20485804 has 12 divisors (see below), whose sum is σ = 35978824. Its totient is φ = 10206144.

The previous prime is 20485789. The next prime is 20485807. The reversal of 20485804 is 40858402.

It is not an unprimeable number, because it can be changed into a prime (20485807) 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, 7917 + ... + 10180.

Almost surely, 2^20485804 is an apocalyptic number.

It is an amenable number.

20485804 is a deficient number, since it is larger than the sum of its proper divisors (15493020).

20485804 is a wasteful number, since it uses less digits than its factorization.

20485804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18384 (or 18382 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 31.

The square root of 20485804 is about 4526.1246116297. The cubic root of 20485804 is about 273.6219946011.

The spelling of 20485804 in words is "twenty million, four hundred eighty-five thousand, eight hundred four".