20447644204 has 24 divisors (see below), whose sum is σ = 38781412208. Its totient is φ = 9377259840.

The previous prime is 20447644169. The next prime is 20447644213. The reversal of 20447644204 is 40244674402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1244142 + ... + 1260469.

Almost surely, 2^20447644204 is an apocalyptic number.

It is an amenable number.

20447644204 is a deficient number, since it is larger than the sum of its proper divisors (18333768004).

20447644204 is a wasteful number, since it uses less digits than its factorization.

20447644204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2504785 (or 2504783 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 37.

The spelling of 20447644204 in words is "twenty billion, four hundred forty-seven million, six hundred forty-four thousand, two hundred four".