Base | Representation |
---|---|
bin | 100110011001… |
… | …0100101111011 |
3 | 1101212201101220 |
4 | 1030302211323 |
5 | 20123131141 |
6 | 1555243123 |
7 | 333050355 |
oct | 114624573 |
9 | 41781356 |
10 | 20130171 |
11 | 103aa106 |
12 | 68a94a3 |
13 | 422a759 |
14 | 29600d5 |
15 | 1b79766 |
hex | 133297b |
20130171 has 8 divisors (see below), whose sum is σ = 26864640. Its totient is φ = 13407912.
The previous prime is 20130169. The next prime is 20130179. The reversal of 20130171 is 17103102.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 20130171 - 21 = 20130169 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 20130171.
It is not an unprimeable number, because it can be changed into a prime (20130179) 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, 1986 + ... + 6648.
It is an arithmetic number, because the mean of its divisors is an integer number (3358080).
Almost surely, 220130171 is an apocalyptic number.
20130171 is a deficient number, since it is larger than the sum of its proper divisors (6734469).
20130171 is a wasteful number, since it uses less digits than its factorization.
20130171 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 6105.
The product of its (nonzero) digits is 42, while the sum is 15.
The square root of 20130171 is about 4486.6659113422. The cubic root of 20130171 is about 272.0293860624.
Adding to 20130171 its reverse (17103102), we get a palindrome (37233273).
It can be divided in two parts, 20130 and 171, that added together give a triangular number (20301 = T201).
The spelling of 20130171 in words is "twenty million, one hundred thirty thousand, one hundred seventy-one".
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