20806840204 has 6 divisors (see below), whose sum is σ = 36411970364. Its totient is φ = 10403420100.

The previous prime is 20806840199. The next prime is 20806840211. The reversal of 20806840204 is 40204860802.

It is a self number, because there is not a number n which added to its sum of digits gives 20806840204.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2600855022 + ... + 2600855029.

Almost surely, 2^20806840204 is an apocalyptic number.

It is an amenable number.

20806840204 is a deficient number, since it is larger than the sum of its proper divisors (15605130160).

20806840204 is a wasteful number, since it uses less digits than its factorization.

20806840204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5201710055 (or 5201710053 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 34.

The spelling of 20806840204 in words is "twenty billion, eight hundred six million, eight hundred forty thousand, two hundred four".