Base | Representation |
---|---|
bin | 1001101100010001000101… |
… | …11001111011010101001000 |
3 | 2210110102112210100120112102 |
4 | 10312020202321323111020 |
5 | 10243134403103131240 |
6 | 113154410131532532 |
7 | 4326520341226130 |
oct | 466104271732510 |
9 | 83412483316472 |
10 | 21312213333320 |
11 | 6877505900328 |
12 | 248254915a148 |
13 | bb796b7b7b10 |
14 | 5397338b7ac0 |
15 | 26e5a611b815 |
hex | 136222e7b548 |
21312213333320 has 128 divisors (see below), whose sum is σ = 59040659462400. Its totient is φ = 6742424503296.
The previous prime is 21312213333317. The next prime is 21312213333353. The reversal of 21312213333320 is 2333331221312.
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, 8577782 + ... + 10779738.
It is an arithmetic number, because the mean of its divisors is an integer number (461255152050).
Almost surely, 221312213333320 is an apocalyptic number.
21312213333320 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 21312213333320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29520329731200).
21312213333320 is an abundant number, since it is smaller than the sum of its proper divisors (37728446129080).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21312213333320 is a wasteful number, since it uses less digits than its factorization.
21312213333320 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2204647 (or 2204643 counting only the distinct ones).
The product of its (nonzero) digits is 11664, while the sum is 29.
Adding to 21312213333320 its reverse (2333331221312), we get a palindrome (23645544554632).
The spelling of 21312213333320 in words is "twenty-one trillion, three hundred twelve billion, two hundred thirteen million, three hundred thirty-three thousand, three hundred twenty".
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