20443204 has 6 divisors (see below), whose sum is σ = 35775614. Its totient is φ = 10221600.

The previous prime is 20443201. The next prime is 20443249. The reversal of 20443204 is 40234402.

It can be written as a sum of positive squares in only one way, i.e., 17239104 + 3204100 = 4152^2 + 1790^2 .

It is not an unprimeable number, because it can be changed into a prime (20443201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2555397 + ... + 2555404.

Almost surely, 2^20443204 is an apocalyptic number.

It is an amenable number.

20443204 is a deficient number, since it is larger than the sum of its proper divisors (15332410).

20443204 is a wasteful number, since it uses less digits than its factorization.

20443204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5110805 (or 5110803 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 20443204 is about 4521.4161498362. The cubic root of 20443204 is about 273.4321983560.

Adding to 20443204 its reverse (40234402), we get a palindrome (60677606).

The spelling of 20443204 in words is "twenty million, four hundred forty-three thousand, two hundred four".