20305804 has 12 divisors (see below), whose sum is σ = 36361864. Its totient is φ = 9916704.

The previous prime is 20305799. The next prime is 20305811. The reversal of 20305804 is 40850302.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58857 + ... + 59200.

Almost surely, 2^20305804 is an apocalyptic number.

It is an amenable number.

20305804 is a deficient number, since it is larger than the sum of its proper divisors (16056060).

20305804 is a wasteful number, since it uses less digits than its factorization.

20305804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118104 (or 118102 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20305804 is about 4506.1961785968. The cubic root of 20305804 is about 272.8182360682.

The spelling of 20305804 in words is "twenty million, three hundred five thousand, eight hundred four".