20117827 has 8 divisors (see below), whose sum is σ = 21416400. Its totient is φ = 18843264.

The previous prime is 20117821. The next prime is 20117843. The reversal of 20117827 is 72871102.

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

It is a cyclic number.

It is not a de Polignac number, because 20117827 - 2²³ = 11729219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20117795 and 20117804.

It is not an unprimeable number, because it can be changed into a prime (20117821) 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 7 ways as a sum of consecutive naturals, for example, 4258 + ... + 7639.

It is an arithmetic number, because the mean of its divisors is an integer number (2677050).

Almost surely, 2^20117827 is an apocalyptic number.

20117827 is a deficient number, since it is larger than the sum of its proper divisors (1298573).

20117827 is a wasteful number, since it uses less digits than its factorization.

20117827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12005.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 20117827 is about 4485.2900686578. The cubic root of 20117827 is about 271.9737710795.

Adding to 20117827 its reverse (72871102), we get a palindrome (92988929).

The spelling of 20117827 in words is "twenty million, one hundred seventeen thousand, eight hundred twenty-seven".