Base | Representation |
---|---|
bin | 10011011000001101… |
… | …100011110110111001 |
3 | 1222201002121111012111 |
4 | 103120031203312321 |
5 | 320103132140320 |
6 | 13320404412321 |
7 | 1334424103516 |
oct | 233015436671 |
9 | 58632544174 |
10 | 20807302585 |
11 | 89081a8443 |
12 | 40483a70a1 |
13 | 1c67a16684 |
14 | 10155d230d |
15 | 81ba86a5a |
hex | 4d8363db9 |
20807302585 has 16 divisors (see below), whose sum is σ = 25959532032. Its totient is φ = 15997449600.
The previous prime is 20807302559. The next prime is 20807302657. The reversal of 20807302585 is 58520370802.
It is not a de Polignac number, because 20807302585 - 27 = 20807302457 is a prime.
It is a Duffinian number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 743721 + ... + 771190.
It is an arithmetic number, because the mean of its divisors is an integer number (1622470752).
Almost surely, 220807302585 is an apocalyptic number.
It is an amenable number.
20807302585 is a deficient number, since it is larger than the sum of its proper divisors (5152229447).
20807302585 is a wasteful number, since it uses less digits than its factorization.
20807302585 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1515024.
The product of its (nonzero) digits is 134400, while the sum is 40.
The spelling of 20807302585 in words is "twenty billion, eight hundred seven million, three hundred two thousand, five hundred eighty-five".
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