21044204 has 6 divisors (see below), whose sum is σ = 36827364. Its totient is φ = 10522100.

The previous prime is 21044197. The next prime is 21044213. The reversal of 21044204 is 40244012.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2630522 + ... + 2630529.

It is an arithmetic number, because the mean of its divisors is an integer number (6137894).

Almost surely, 2^21044204 is an apocalyptic number.

It is an amenable number.

21044204 is a deficient number, since it is larger than the sum of its proper divisors (15783160).

21044204 is a wasteful number, since it uses less digits than its factorization.

21044204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5261055 (or 5261053 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 21044204 is about 4587.3962113600. The cubic root of 21044204 is about 276.0858621049.

Adding to 21044204 its reverse (40244012), we get a palindrome (61288216).

The spelling of 21044204 in words is "twenty-one million, forty-four thousand, two hundred four".