Base | Representation |
---|---|
bin | 10100011010010110… |
… | …111111001111001011 |
3 | 2002120102211112021211 |
4 | 110122112333033023 |
5 | 324341232222113 |
6 | 14022450513551 |
7 | 1404061011043 |
oct | 243226771713 |
9 | 62512745254 |
10 | 21917070283 |
11 | 9327684329 |
12 | 42b7b958b7 |
13 | 20b3907254 |
14 | 10bcb54723 |
15 | 8841ebb3d |
hex | 51a5bf3cb |
21917070283 has 2 divisors, whose sum is σ = 21917070284. Its totient is φ = 21917070282.
The previous prime is 21917070233. The next prime is 21917070299. The reversal of 21917070283 is 38207071912.
It is a happy number.
It is a strong prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-21917070283 is a prime.
It is not a weakly prime, because it can be changed into another prime (21917070233) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10958535141 + 10958535142.
It is an arithmetic number, because the mean of its divisors is an integer number (10958535142).
Almost surely, 221917070283 is an apocalyptic number.
21917070283 is a deficient number, since it is larger than the sum of its proper divisors (1).
21917070283 is an equidigital number, since it uses as much as digits as its factorization.
21917070283 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 42336, while the sum is 40.
The spelling of 21917070283 in words is "twenty-one billion, nine hundred seventeen million, seventy thousand, two hundred eighty-three".
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