Base | Representation |
---|---|
bin | 10011101010010111… |
… | …111110100010100000 |
3 | 2000111022222220022012 |
4 | 103222113332202200 |
5 | 321214134220300 |
6 | 13410531532052 |
7 | 1345114144022 |
oct | 235227764240 |
9 | 60438886265 |
10 | 21112023200 |
11 | 8a54206564 |
12 | 411245a028 |
13 | 1cb5ba8028 |
14 | 1043c74012 |
15 | 8386c9435 |
hex | 4ea5fe8a0 |
21112023200 has 144 divisors (see below), whose sum is σ = 53996544000. Its totient is φ = 8049699840.
The previous prime is 21112023193. The next prime is 21112023221. The reversal of 21112023200 is 232021112.
It is a happy number.
It is an unprimeable number.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1827041 + ... + 1838559.
It is an arithmetic number, because the mean of its divisors is an integer number (374976000).
Almost surely, 221112023200 is an apocalyptic number.
21112023200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 21112023200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26998272000).
21112023200 is an abundant number, since it is smaller than the sum of its proper divisors (32884520800).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21112023200 is a wasteful number, since it uses less digits than its factorization.
21112023200 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 11647 (or 11634 counting only the distinct ones).
The product of its (nonzero) digits is 48, while the sum is 14.
Adding to 21112023200 its reverse (232021112), we get a palindrome (21344044312).
The spelling of 21112023200 in words is "twenty-one billion, one hundred twelve million, twenty-three thousand, two hundred".
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