20842204 has 12 divisors (see below), whose sum is σ = 38619504. Its totient is φ = 9808064.

The previous prime is 20842201. The next prime is 20842219. The reversal of 20842204 is 40224802.

20842204 = 322² + 323² + ... + 457².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20842201) 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 3 ways as a sum of consecutive naturals, for example, 153184 + ... + 153319.

It is an arithmetic number, because the mean of its divisors is an integer number (3218292).

Almost surely, 2^20842204 is an apocalyptic number.

It is an amenable number.

20842204 is a deficient number, since it is larger than the sum of its proper divisors (17777300).

20842204 is a wasteful number, since it uses less digits than its factorization.

20842204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306524 (or 306522 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 20842204 is about 4565.3262753061. The cubic root of 20842204 is about 275.1996522609.

The spelling of 20842204 in words is "twenty million, eight hundred forty-two thousand, two hundred four".