20118017 has 8 divisors (see below), whose sum is σ = 21252000. Its totient is φ = 18991584.

The previous prime is 20118013. The next prime is 20118029. The reversal of 20118017 is 71081102.

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 20118017 - 2² = 20118013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20118017.

It is not an unprimeable number, because it can be changed into a prime (20118011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4109 + ... + 7557.

It is an arithmetic number, because the mean of its divisors is an integer number (2656500).

Almost surely, 2^20118017 is an apocalyptic number.

It is an amenable number.

20118017 is a deficient number, since it is larger than the sum of its proper divisors (1133983).

20118017 is a wasteful number, since it uses less digits than its factorization.

20118017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3775.

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 20118017 is about 4485.3112489547. The cubic root of 20118017 is about 271.9746272829.

Adding to 20118017 its reverse (71081102), we get a palindrome (91199119).

The spelling of 20118017 in words is "twenty million, one hundred eighteen thousand, seventeen".