Base | Representation |
---|---|
bin | 10011111100010000… |
… | …110110000011100010 |
3 | 2001021020201120201120 |
4 | 103330100312003202 |
5 | 322323002041310 |
6 | 13500412313110 |
7 | 1355420133564 |
oct | 237420660342 |
9 | 61236646646 |
10 | 21412143330 |
11 | 9098662226 |
12 | 4196a72796 |
13 | 20331186c6 |
14 | 1071a79334 |
15 | 854c0db70 |
hex | 4fc4360e2 |
21412143330 has 64 divisors (see below), whose sum is σ = 53304514560. Its totient is φ = 5498148096.
The previous prime is 21412143307. The next prime is 21412143341. The reversal of 21412143330 is 3334121412.
It is a happy number.
It is a self number, because there is not a number n which added to its sum of digits gives 21412143330.
It is an unprimeable number.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 291519 + ... + 357501.
It is an arithmetic number, because the mean of its divisors is an integer number (832883040).
Almost surely, 221412143330 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 21412143330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26652257280).
21412143330 is an abundant number, since it is smaller than the sum of its proper divisors (31892371230).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21412143330 is a wasteful number, since it uses less digits than its factorization.
21412143330 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 66395.
The product of its (nonzero) digits is 1728, while the sum is 24.
Adding to 21412143330 its reverse (3334121412), we get a palindrome (24746264742).
The spelling of 21412143330 in words is "twenty-one billion, four hundred twelve million, one hundred forty-three thousand, three hundred thirty".
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