| Base | Representation |
|---|---|
| bin | 10100001111001111… |
| … | …010001100000000000 |
| 3 | 2002002102202201000000 |
| 4 | 110033033101200000 |
| 5 | 324001001423220 |
| 6 | 13552144000000 |
| 7 | 1366334122131 |
| oct | 241717214000 |
| 9 | 62072681000 |
| 10 | 21730498560 |
| 11 | 9241333221 |
| 12 | 4265600000 |
| 13 | 2084072094 |
| 14 | 10a2069c88 |
| 15 | 872b46390 |
| hex | 50f3d1800 |
21730498560 has 672 divisors, whose sum is σ = 81209550240. Its totient is φ = 5573836800.
The previous prime is 21730498553. The next prime is 21730498567. The reversal of 21730498560 is 6589403712.
21730498560 is a `hidden beast` number, since 2 + 17 + 30 + 49 + 8 + 560 = 666.
It is an interprime number because it is at equal distance from previous prime (21730498553) and next prime (21730498567).
It is a Harshad number since it is a multiple of its sum of digits (45).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (21730498567) 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 55 ways as a sum of consecutive naturals, for example, 306063325 + ... + 306063395.
It is an arithmetic number, because the mean of its divisors is an integer number (120847545).
It is a 1-persistent number, because it is pandigital, but 2⋅21730498560 = 43460997120 is not.
Almost surely, 221730498560 is an apocalyptic number.
21730498560 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 21730498560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40604775120).
21730498560 is an abundant number, since it is smaller than the sum of its proper divisors (59479051680).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21730498560 is an frugal number, since it uses more digits than its factorization.
21730498560 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 157 (or 122 counting only the distinct ones).
The product of its (nonzero) digits is 362880, while the sum is 45.
The spelling of 21730498560 in words is "twenty-one billion, seven hundred thirty million, four hundred ninety-eight thousand, five hundred sixty".
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