Base | Representation |
---|---|
bin | 100111111100… |
… | …1000011100001 |
3 | 1110102000111101 |
4 | 1033321003201 |
5 | 20330134243 |
6 | 2024514401 |
7 | 343004344 |
oct | 117710341 |
9 | 43360441 |
10 | 20943073 |
11 | 10904928 |
12 | 701ba01 |
13 | 4453768 |
14 | 2ad245b |
15 | 1c8a54d |
hex | 13f90e1 |
20943073 has 16 divisors (see below), whose sum is σ = 23395840. Its totient is φ = 18681840.
The previous prime is 20943071. The next prime is 20943089. The reversal of 20943073 is 37034902.
It is not a de Polignac number, because 20943073 - 21 = 20943071 is a prime.
It is a super-2 number, since 2×209430732 = 877224613366658, which contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (20943071) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 566011 + ... + 566047.
It is an arithmetic number, because the mean of its divisors is an integer number (1462240).
Almost surely, 220943073 is an apocalyptic number.
It is an amenable number.
20943073 is a deficient number, since it is larger than the sum of its proper divisors (2452767).
20943073 is an frugal number, since it uses more digits than its factorization.
20943073 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 149 (or 87 counting only the distinct ones).
The product of its (nonzero) digits is 4536, while the sum is 28.
The square root of 20943073 is about 4576.3602349465. The cubic root of 20943073 is about 275.6428947680.
Adding to 20943073 its reverse (37034902), we get a palindrome (57977975).
The spelling of 20943073 in words is "twenty million, nine hundred forty-three thousand, seventy-three".
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