| Base | Representation |
|---|---|
| bin | 100110011101… |
| … | …0110011101000 |
| 3 | 1101221102120000 |
| 4 | 1030322303220 |
| 5 | 20130220231 |
| 6 | 2000103000 |
| 7 | 333250431 |
| oct | 114726350 |
| 9 | 41842500 |
| 10 | 20163816 |
| 11 | 10422412 |
| 12 | 6904a60 |
| 13 | 423cb6a |
| 14 | 296c488 |
| 15 | 1b846e6 |
| hex | 133ace8 |
20163816 has 120 divisors (see below), whose sum is σ = 60072870. Its totient is φ = 6314112.
The previous prime is 20163811. The next prime is 20163817. The reversal of 20163816 is 61836102.
20163816 is a `hidden beast` number, since 20 + 1 + 638 + 1 + 6 = 666.
It can be written as a sum of positive squares in 3 ways, for example, as 19766916 + 396900 = 4446^2 + 630^2 .
It is a Harshad number since it is a multiple of its sum of digits (27).
It is a self number, because there is not a number n which added to its sum of digits gives 20163816.
It is not an unprimeable number, because it can be changed into a prime (20163811) 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 29 ways as a sum of consecutive naturals, for example, 544950 + ... + 544986.
Almost surely, 220163816 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 20163816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30036435).
20163816 is an abundant number, since it is smaller than the sum of its proper divisors (39909054).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20163816 is a wasteful number, since it uses less digits than its factorization.
20163816 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 113 (or 71 counting only the distinct ones).
The product of its (nonzero) digits is 1728, while the sum is 27.
The square root of 20163816 is about 4490.4137893963. The cubic root of 20163816 is about 272.1808557872.
Adding to 20163816 its reverse (61836102), we get a palindrome (81999918).
It can be divided in two parts, 2016 and 3816, that added together give a cube (5832 = 183).
The spelling of 20163816 in words is "twenty million, one hundred sixty-three thousand, eight hundred sixteen".
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