Base | Representation |
---|---|
bin | 100101110111… |
… | …1001000101101 |
3 | 1101100200101111 |
4 | 1023233020231 |
5 | 20040310434 |
6 | 1545312021 |
7 | 330520000 |
oct | 113571055 |
9 | 41320344 |
10 | 19853869 |
11 | 10230562 |
12 | 6795611 |
13 | 4161a69 |
14 | 28cb537 |
15 | 1b22964 |
hex | 12ef22d |
19853869 has 10 divisors (see below), whose sum is σ = 23164270. Its totient is φ = 17015544.
The previous prime is 19853861. The next prime is 19853891. The reversal of 19853869 is 96835891.
It can be written as a sum of positive squares in only one way, i.e., 19448100 + 405769 = 4410^2 + 637^2 .
It is not a de Polignac number, because 19853869 - 23 = 19853861 is a prime.
It is a super-2 number, since 2×198538692 = 788352228538322, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (49).
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (19853861) by changing a digit.
It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1734 + ... + 6535.
It is an arithmetic number, because the mean of its divisors is an integer number (2316427).
Almost surely, 219853869 is an apocalyptic number.
It is an amenable number.
19853869 is a deficient number, since it is larger than the sum of its proper divisors (3310401).
19853869 is an frugal number, since it uses more digits than its factorization.
19853869 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 8297 (or 8276 counting only the distinct ones).
The product of its digits is 466560, while the sum is 49.
The square root of 19853869 is about 4455.7680594932. The cubic root of 19853869 is about 270.7790440348.
The spelling of 19853869 in words is "nineteen million, eight hundred fifty-three thousand, eight hundred sixty-nine".
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