Base | Representation |
---|---|
bin | 10000111001101001… |
… | …110110111111110101 |
3 | 1201211201001102012012 |
4 | 100321221312333311 |
5 | 244131132044134 |
6 | 12200420134005 |
7 | 1211463114254 |
oct | 207151667765 |
9 | 51751042165 |
10 | 18147143669 |
11 | 77726536a6 |
12 | 3625537305 |
13 | 193286c345 |
14 | c421b079b |
15 | 7132716ce |
hex | 439a76ff5 |
18147143669 has 2 divisors, whose sum is σ = 18147143670. Its totient is φ = 18147143668.
The previous prime is 18147143587. The next prime is 18147143717. The reversal of 18147143669 is 96634174181.
It is a happy number.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 12850943044 + 5296200625 = 113362^2 + 72775^2 .
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-18147143669 is a prime.
It is a super-2 number, since 2×181471436692 (a number of 21 digits) contains 22 as substring.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (18147113669) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9073571834 + 9073571835.
It is an arithmetic number, because the mean of its divisors is an integer number (9073571835).
Almost surely, 218147143669 is an apocalyptic number.
It is an amenable number.
18147143669 is a deficient number, since it is larger than the sum of its proper divisors (1).
18147143669 is an equidigital number, since it uses as much as digits as its factorization.
18147143669 is an evil number, because the sum of its binary digits is even.
The product of its digits is 870912, while the sum is 50.
The spelling of 18147143669 in words is "eighteen billion, one hundred forty-seven million, one hundred forty-three thousand, six hundred sixty-nine".
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