20700117 has 20 divisors (see below), whose sum is σ = 31305120. Its totient is φ = 13629384.

The previous prime is 20700109. The next prime is 20700143. The reversal of 20700117 is 71100702.

It is not a de Polignac number, because 20700117 - 2³ = 20700109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20700117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20700187) 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 19 ways as a sum of consecutive naturals, for example, 5184 + ... + 8262.

It is an arithmetic number, because the mean of its divisors is an integer number (1565256).

Almost surely, 2^20700117 is an apocalyptic number.

20700117 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20700117 is a deficient number, since it is larger than the sum of its proper divisors (10605003).

20700117 is an equidigital number, since it uses as much as digits as its factorization.

20700117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3174 (or 3165 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 18.

The square root of 20700117 is about 4549.7381243320. The cubic root of 20700117 is about 274.5728553369.

Adding to 20700117 its reverse (71100702), we get a palindrome (91800819).

The spelling of 20700117 in words is "twenty million, seven hundred thousand, one hundred seventeen".