Base | Representation |
---|---|
bin | 101000010101… |
… | …0010001100111 |
3 | 1110210021001021 |
4 | 1100222101213 |
5 | 20403112204 |
6 | 2033112011 |
7 | 344504203 |
oct | 120522147 |
9 | 43707037 |
10 | 21144679 |
11 | 10a32346 |
12 | 70b8607 |
13 | 44c445a |
14 | 2b45b03 |
15 | 1cca154 |
hex | 142a467 |
21144679 has 2 divisors, whose sum is σ = 21144680. Its totient is φ = 21144678.
The previous prime is 21144677. The next prime is 21144703. The reversal of 21144679 is 97644112.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 21144679 - 21 = 21144677 is a prime.
Together with 21144677, it forms a pair of twin primes.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (21144677) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10572339 + 10572340.
It is an arithmetic number, because the mean of its divisors is an integer number (10572340).
Almost surely, 221144679 is an apocalyptic number.
21144679 is a deficient number, since it is larger than the sum of its proper divisors (1).
21144679 is an equidigital number, since it uses as much as digits as its factorization.
21144679 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 12096, while the sum is 34.
The square root of 21144679 is about 4598.3343723570. The cubic root of 21144679 is about 276.5245529069.
The spelling of 21144679 in words is "twenty-one million, one hundred forty-four thousand, six hundred seventy-nine".
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