20604243 has 24 divisors (see below), whose sum is σ = 31187968. Its totient is φ = 12078000.

The previous prime is 20604211. The next prime is 20604247. The reversal of 20604243 is 34240602.

It is not a de Polignac number, because 20604243 - 2⁵ = 20604211 is a prime.

It is a Duffinian number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10338 + ... + 12168.

Almost surely, 2^20604243 is an apocalyptic number.

20604243 is a deficient number, since it is larger than the sum of its proper divisors (10583725).

20604243 is a wasteful number, since it uses less digits than its factorization.

20604243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887 (or 1876 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 20604243 is about 4539.1896853954. The cubic root of 20604243 is about 274.1482982534.

Adding to 20604243 its reverse (34240602), we get a palindrome (54844845).

The spelling of 20604243 in words is "twenty million, six hundred four thousand, two hundred forty-three".