Base | Representation |
---|---|
bin | 10111111111100010… |
… | …00111011001010011 |
3 | 1020020200212121011210 |
4 | 23333301013121103 |
5 | 202340014000034 |
6 | 5530100311203 |
7 | 634126456626 |
oct | 137761073123 |
9 | 36220777153 |
10 | 12881000019 |
11 | 550aa96a68 |
12 | 25b59a2503 |
13 | 12a3838004 |
14 | 8a2a2ddbd |
15 | 505c978e9 |
hex | 2ffc47653 |
12881000019 has 8 divisors (see below), whose sum is σ = 17309900800. Its totient is φ = 8519716296.
The previous prime is 12880999997. The next prime is 12881000051. The reversal of 12881000019 is 91000018821.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 12881000019 - 25 = 12880999987 is a prime.
It is a super-2 number, since 2×128810000192 (a number of 21 digits) contains 22 as substring.
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 12881000019.
It is not an unprimeable number, because it can be changed into a prime (12881000089) 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, 16903819 + ... + 16904580.
It is an arithmetic number, because the mean of its divisors is an integer number (2163737600).
Almost surely, 212881000019 is an apocalyptic number.
12881000019 is a deficient number, since it is larger than the sum of its proper divisors (4428900781).
12881000019 is a wasteful number, since it uses less digits than its factorization.
12881000019 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 33808529.
The product of its (nonzero) digits is 1152, while the sum is 30.
The spelling of 12881000019 in words is "twelve billion, eight hundred eighty-one million, nineteen", and thus it is an aban number.
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