20804107 has 16 divisors (see below), whose sum is σ = 23997600. Its totient is φ = 17902080.

The previous prime is 20804099. The next prime is 20804123. The reversal of 20804107 is 70140802.

It is a cyclic number.

It is not a de Polignac number, because 20804107 - 2³ = 20804099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20804137) 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 15 ways as a sum of consecutive naturals, for example, 8257 + ... + 10477.

It is an arithmetic number, because the mean of its divisors is an integer number (1499850).

Almost surely, 2^20804107 is an apocalyptic number.

20804107 is a deficient number, since it is larger than the sum of its proper divisors (3193493).

20804107 is a wasteful number, since it uses less digits than its factorization.

20804107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2286.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 20804107 is about 4561.1519378332. The cubic root of 20804107 is about 275.0318728898.

Adding to 20804107 its reverse (70140802), we get a palindrome (90944909).

The spelling of 20804107 in words is "twenty million, eight hundred four thousand, one hundred seven".