Base | Representation |
---|---|
bin | 100110010010… |
… | …0100000111101 |
3 | 1101202210022021 |
4 | 1030210200331 |
5 | 20114310014 |
6 | 1554120141 |
7 | 332420302 |
oct | 114444075 |
9 | 41683267 |
10 | 20072509 |
11 | 1036a856 |
12 | 6880051 |
13 | 420a432 |
14 | 29470a9 |
15 | 1b67624 |
hex | 132483d |
20072509 has 2 divisors, whose sum is σ = 20072510. Its totient is φ = 20072508.
The previous prime is 20072497. The next prime is 20072513. The reversal of 20072509 is 90527002.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 12355225 + 7717284 = 3515^2 + 2778^2 .
It is a cyclic number.
It is not a de Polignac number, because 20072509 - 211 = 20070461 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (20072519) 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, 10036254 + 10036255.
It is an arithmetic number, because the mean of its divisors is an integer number (10036255).
Almost surely, 220072509 is an apocalyptic number.
It is an amenable number.
20072509 is a deficient number, since it is larger than the sum of its proper divisors (1).
20072509 is an equidigital number, since it uses as much as digits as its factorization.
20072509 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 1260, while the sum is 25.
The square root of 20072509 is about 4480.2353732812. The cubic root of 20072509 is about 271.7693988787.
The spelling of 20072509 in words is "twenty million, seventy-two thousand, five hundred nine".
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