21044044204 has 24 divisors (see below), whose sum is σ = 37627657200. Its totient is φ = 10295393856.

The previous prime is 21044044199. The next prime is 21044044237. The reversal of 21044044204 is 40244044012.

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, 223567 + ... + 303430.

It is an arithmetic number, because the mean of its divisors is an integer number (1567819050).

Almost surely, 2^21044044204 is an apocalyptic number.

It is an amenable number.

21044044204 is a deficient number, since it is larger than the sum of its proper divisors (16583612996).

21044044204 is a wasteful number, since it uses less digits than its factorization.

21044044204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527217 (or 527215 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 21044044204 its reverse (40244044012), we get a palindrome (61288088216).

The spelling of 21044044204 in words is "twenty-one billion, forty-four million, forty-four thousand, two hundred four".