20017109 has 8 divisors (see below), whose sum is σ = 24222528. Its totient is φ = 16148160.

The previous prime is 20017091. The next prime is 20017117. The reversal of 20017109 is 90171002.

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

It is a de Polignac number, because none of the positive numbers 2^k-20017109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20017169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83987 + ... + 84224.

It is an arithmetic number, because the mean of its divisors is an integer number (3027816).

Almost surely, 2^20017109 is an apocalyptic number.

It is an amenable number.

20017109 is a deficient number, since it is larger than the sum of its proper divisors (4205419).

20017109 is a wasteful number, since it uses less digits than its factorization.

20017109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168235.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 20017109 is about 4474.0483904401. The cubic root of 20017109 is about 271.5191412172.

The spelling of 20017109 in words is "twenty million, seventeen thousand, one hundred nine".