20604244 has 6 divisors (see below), whose sum is σ = 36057434. Its totient is φ = 10302120.

The previous prime is 20604211. The next prime is 20604247. The reversal of 20604244 is 44240602.

It can be written as a sum of positive squares in only one way, i.e., 14152644 + 6451600 = 3762^2 + 2540^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20604247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2575527 + ... + 2575534.

Almost surely, 2^20604244 is an apocalyptic number.

It is an amenable number.

20604244 is a deficient number, since it is larger than the sum of its proper divisors (15453190).

20604244 is a wasteful number, since it uses less digits than its factorization.

20604244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151065 (or 5151063 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 20604244 is about 4539.1897955472. The cubic root of 20604244 is about 274.1483026885.

Adding to 20604244 its reverse (44240602), we get a palindrome (64844846).

The spelling of 20604244 in words is "twenty million, six hundred four thousand, two hundred forty-four".