20110117 has 4 divisors (see below), whose sum is σ = 20410336. Its totient is φ = 19809900.

The previous prime is 20110109. The next prime is 20110141. The reversal of 20110117 is 71101102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20110117 - 2³ = 20110109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20110097 and 20110106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110217) 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, 150009 + ... + 150142.

It is an arithmetic number, because the mean of its divisors is an integer number (5102584).

Almost surely, 2^20110117 is an apocalyptic number.

It is an amenable number.

20110117 is a deficient number, since it is larger than the sum of its proper divisors (300219).

20110117 is an equidigital number, since it uses as much as digits as its factorization.

20110117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300218.

The product of its (nonzero) digits is 14, while the sum is 13.

The square root of 20110117 is about 4484.4305101094. The cubic root of 20110117 is about 271.9390226993.

Adding to 20110117 its reverse (71101102), we get a palindrome (91211219).

The spelling of 20110117 in words is "twenty million, one hundred ten thousand, one hundred seventeen".