Base | Representation |
---|---|
bin | 10010101111110111… |
… | …000111101001001010 |
3 | 1220221220202210001121 |
4 | 102233313013221022 |
5 | 312211331044320 |
6 | 13125302505454 |
7 | 1311563664163 |
oct | 225767075112 |
9 | 56856683047 |
10 | 20130331210 |
11 | 85a0057870 |
12 | 3a9973528a |
13 | 1b8a6ab0b2 |
14 | d8d73076a |
15 | 7cc4128aa |
hex | 4afdc7a4a |
20130331210 has 128 divisors (see below), whose sum is σ = 43087189248. Its totient is φ = 6689280000.
The previous prime is 20130331189. The next prime is 20130331211. The reversal of 20130331210 is 1213303102.
It is not an unprimeable number, because it can be changed into a prime (20130331211) by changing a digit.
It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10009105 + ... + 10011115.
It is an arithmetic number, because the mean of its divisors is an integer number (336618666).
Almost surely, 220130331210 is an apocalyptic number.
20130331210 is an abundant number, since it is smaller than the sum of its proper divisors (22956858038).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20130331210 is a wasteful number, since it uses less digits than its factorization.
20130331210 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2200.
The product of its (nonzero) digits is 108, while the sum is 16.
Adding to 20130331210 its reverse (1213303102), we get a palindrome (21343634312).
The spelling of 20130331210 in words is "twenty billion, one hundred thirty million, three hundred thirty-one thousand, two hundred ten".
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