Base | Representation |
---|---|
bin | 10010101111011011… |
… | …111011011000111011 |
3 | 1220221102100122011200 |
4 | 102233123323120323 |
5 | 312203020000011 |
6 | 13124450025243 |
7 | 1311446255463 |
oct | 225733733073 |
9 | 56842318150 |
10 | 20123203131 |
11 | 8597029399 |
12 | 3a97278223 |
13 | 1b890837b5 |
14 | d8c7d6ba3 |
15 | 7cb9a5856 |
hex | 4af6fb63b |
20123203131 has 24 divisors (see below), whose sum is σ = 29138672160. Its totient is φ = 13382370816.
The previous prime is 20123203123. The next prime is 20123203157. The reversal of 20123203131 is 13130232102.
20123203131 is a `hidden beast` number, since 20 + 12 + 320 + 313 + 1 = 666.
It is not a de Polignac number, because 20123203131 - 23 = 20123203123 is a prime.
It is a super-2 number, since 2×201232031312 (a number of 21 digits) contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (20123203181) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (23) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8852011 + ... + 8854283.
It is an arithmetic number, because the mean of its divisors is an integer number (1214111340).
Almost surely, 220123203131 is an apocalyptic number.
20123203131 is a deficient number, since it is larger than the sum of its proper divisors (9015469029).
20123203131 is a wasteful number, since it uses less digits than its factorization.
20123203131 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4275 (or 4272 counting only the distinct ones).
The product of its (nonzero) digits is 216, while the sum is 18.
Adding to 20123203131 its reverse (13130232102), we get a palindrome (33253435233).
The spelling of 20123203131 in words is "twenty billion, one hundred twenty-three million, two hundred three thousand, one hundred thirty-one".
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