20806107 has 8 divisors (see below), whose sum is σ = 31704576. Its totient is φ = 11889192.

The previous prime is 20806091. The next prime is 20806117. The reversal of 20806107 is 70160802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20806107 - 2⁴ = 20806091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20806117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 495363 + ... + 495404.

It is an arithmetic number, because the mean of its divisors is an integer number (3963072).

Almost surely, 2^20806107 is an apocalyptic number.

20806107 is a deficient number, since it is larger than the sum of its proper divisors (10898469).

20806107 is an equidigital number, since it uses as much as digits as its factorization.

20806107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990777.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 20806107 is about 4561.3711754252. The cubic root of 20806107 is about 275.0406859913.

Adding to 20806107 its reverse (70160802), we get a palindrome (90966909).

The spelling of 20806107 in words is "twenty million, eight hundred six thousand, one hundred seven".