Base | Representation |
---|---|
bin | 100111001010… |
… | …0000110100001 |
3 | 1102122000021102 |
4 | 1032110012201 |
5 | 20223421234 |
6 | 2012004145 |
7 | 336332654 |
oct | 116240641 |
9 | 42560242 |
10 | 20529569 |
11 | 10652195 |
12 | 6a60655 |
13 | 433a498 |
14 | 2a2589b |
15 | 1c07c7e |
hex | 13941a1 |
20529569 has 2 divisors, whose sum is σ = 20529570. Its totient is φ = 20529568.
The previous prime is 20529539. The next prime is 20529577. The reversal of 20529569 is 96592502.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 18318400 + 2211169 = 4280^2 + 1487^2 .
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-20529569 is a prime.
It is a super-2 number, since 2×205295692 = 842926406651522, which contains 22 as substring.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (20529529) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10264784 + 10264785.
It is an arithmetic number, because the mean of its divisors is an integer number (10264785).
Almost surely, 220529569 is an apocalyptic number.
It is an amenable number.
20529569 is a deficient number, since it is larger than the sum of its proper divisors (1).
20529569 is an equidigital number, since it uses as much as digits as its factorization.
20529569 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 48600, while the sum is 38.
The square root of 20529569 is about 4530.9567422345. The cubic root of 20529569 is about 273.8167074703.
The spelling of 20529569 in words is "twenty million, five hundred twenty-nine thousand, five hundred sixty-nine".
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