Base | Representation |
---|---|
bin | 100110100101… |
… | …1111110100000 |
3 | 1102002000000202 |
4 | 1031023332200 |
5 | 20134443034 |
6 | 2001404332 |
7 | 333662450 |
oct | 115137640 |
9 | 42060022 |
10 | 20234144 |
11 | 10470237 |
12 | 69396a8 |
13 | 4265b88 |
14 | 2989d60 |
15 | 1b9a47e |
hex | 134bfa0 |
20234144 has 48 divisors (see below), whose sum is σ = 46021248. Its totient is φ = 8577792.
The previous prime is 20234143. The next prime is 20234147. The reversal of 20234144 is 44143202.
It is not an unprimeable number, because it can be changed into a prime (20234143) 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 7 ways as a sum of consecutive naturals, for example, 22634 + ... + 23510.
It is an arithmetic number, because the mean of its divisors is an integer number (958776).
Almost surely, 220234144 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 20234144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23010624).
20234144 is an abundant number, since it is smaller than the sum of its proper divisors (25787104).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20234144 is a wasteful number, since it uses less digits than its factorization.
20234144 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 997 (or 989 counting only the distinct ones).
The product of its (nonzero) digits is 768, while the sum is 20.
The square root of 20234144 is about 4498.2378772137. The cubic root of 20234144 is about 272.4969289557.
Adding to 20234144 its reverse (44143202), we get a palindrome (64377346).
The spelling of 20234144 in words is "twenty million, two hundred thirty-four thousand, one hundred forty-four".
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