Base | Representation |
---|---|
bin | 10000111000000001… |
… | …111001011101111101 |
3 | 1201202210202211022011 |
4 | 100320001321131331 |
5 | 244102143001223 |
6 | 12154004051221 |
7 | 1211012350003 |
oct | 207001713575 |
9 | 51683684264 |
10 | 18119890813 |
11 | 775922a182 |
12 | 3618393b11 |
13 | 192a0198ab |
14 | c3c718a73 |
15 | 710b8b80d |
hex | 43807977d |
18119890813 has 2 divisors, whose sum is σ = 18119890814. Its totient is φ = 18119890812.
The previous prime is 18119890799. The next prime is 18119890819. The reversal of 18119890813 is 31809891181.
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., 16425498244 + 1694392569 = 128162^2 + 41163^2 .
It is a cyclic number.
It is not a de Polignac number, because 18119890813 - 233 = 9529956221 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (18119890819) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9059945406 + 9059945407.
It is an arithmetic number, because the mean of its divisors is an integer number (9059945407).
Almost surely, 218119890813 is an apocalyptic number.
It is an amenable number.
18119890813 is a deficient number, since it is larger than the sum of its proper divisors (1).
18119890813 is an equidigital number, since it uses as much as digits as its factorization.
18119890813 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 124416, while the sum is 49.
The spelling of 18119890813 in words is "eighteen billion, one hundred nineteen million, eight hundred ninety thousand, eight hundred thirteen".
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