Base | Representation |
---|---|
bin | 10001101100011111… |
… | …001111111001011011 |
3 | 1211001010212000021002 |
4 | 101230133033321123 |
5 | 302403000000331 |
6 | 12421203535215 |
7 | 1241560223162 |
oct | 215437177133 |
9 | 54033760232 |
10 | 19000000091 |
11 | 8070006316 |
12 | 382308a50b |
13 | 1a3a46a807 |
14 | cc35783d9 |
15 | 7630899cb |
hex | 46c7cfe5b |
19000000091 has 2 divisors, whose sum is σ = 19000000092. Its totient is φ = 19000000090.
The previous prime is 19000000079. The next prime is 19000000121.
19000000091 is nontrivially palindromic in base 10.
It is a weak prime.
It is a palprime.
It is a cyclic number.
It is not a de Polignac number, because 19000000091 - 230 = 17926258267 is a prime.
It is a super-2 number, since 2×190000000912 (a number of 21 digits) contains 22 as substring.
It is not a weakly prime, because it can be changed into another prime (19000000031) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9500000045 + 9500000046.
It is an arithmetic number, because the mean of its divisors is an integer number (9500000046).
Almost surely, 219000000091 is an apocalyptic number.
19000000091 is a deficient number, since it is larger than the sum of its proper divisors (1).
19000000091 is an equidigital number, since it uses as much as digits as its factorization.
19000000091 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 81, while the sum is 20.
It can be divided in two parts, 190000000 and 91, that added together give a palindrome (190000091).
The spelling of 19000000091 in words is "nineteen billion, ninety-one", and thus it is an aban number and an uban number.
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