Base | Representation |
---|---|
bin | 100111111011… |
… | …1011101100101 |
3 | 1110101200112202 |
4 | 1033313131211 |
5 | 20324432144 |
6 | 2024424245 |
7 | 342646334 |
oct | 117673545 |
9 | 43350482 |
10 | 20936549 |
11 | 108aaa37 |
12 | 7018085 |
13 | 44507ba |
14 | 2acdd1b |
15 | 1c8864e |
hex | 13f7765 |
20936549 has 2 divisors, whose sum is σ = 20936550. Its totient is φ = 20936548.
The previous prime is 20936507. The next prime is 20936567. The reversal of 20936549 is 94563902.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 14212900 + 6723649 = 3770^2 + 2593^2 .
It is a cyclic number.
It is not a de Polignac number, because 20936549 - 212 = 20932453 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (20636549) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10468274 + 10468275.
It is an arithmetic number, because the mean of its divisors is an integer number (10468275).
Almost surely, 220936549 is an apocalyptic number.
It is an amenable number.
20936549 is a deficient number, since it is larger than the sum of its proper divisors (1).
20936549 is an equidigital number, since it uses as much as digits as its factorization.
20936549 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 58320, while the sum is 38.
The square root of 20936549 is about 4575.6473858898. The cubic root of 20936549 is about 275.6142698538.
The spelling of 20936549 in words is "twenty million, nine hundred thirty-six thousand, five hundred forty-nine".
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