20081107 has 2 divisors, whose sum is σ = 20081108. Its totient is φ = 20081106.

The previous prime is 20081077. The next prime is 20081153. The reversal of 20081107 is 70118002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20081107 - 2¹⁹ = 19556819 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20081197) 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 as a sum of consecutive naturals, namely, 10040553 + 10040554.

It is an arithmetic number, because the mean of its divisors is an integer number (10040554).

Almost surely, 2^20081107 is an apocalyptic number.

20081107 is a deficient number, since it is larger than the sum of its proper divisors (1).

20081107 is an equidigital number, since it uses as much as digits as its factorization.

20081107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 20081107 is about 4481.1948183492. The cubic root of 20081107 is about 271.8081972129.

Adding to 20081107 its reverse (70118002), we get a palindrome (90199109).

The spelling of 20081107 in words is "twenty million, eighty-one thousand, one hundred seven".