| Base | Representation |
|---|---|
| bin | 1010111101001011011… |
| … | …0111010100111110100 |
| 3 | 122222211110101220100000 |
| 4 | 2233102312322213310 |
| 5 | 11040434112024410 |
| 6 | 222245001351300 |
| 7 | 16412203562514 |
| oct | 2572266724764 |
| 9 | 588743356300 |
| 10 | 188221204980 |
| 11 | 72907a66166 |
| 12 | 3058aa98530 |
| 13 | 14997c57693 |
| 14 | 9177a05844 |
| 15 | 4d6934adc0 |
| hex | 2bd2dba9f4 |
188221204980 has 144 divisors (see below), whose sum is σ = 592280357760. Its totient is φ = 50175635328.
The previous prime is 188221204939. The next prime is 188221204981. The reversal of 188221204980 is 89402122881.
188221204980 is a `hidden beast` number, since 18 + 8 + 22 + 120 + 498 + 0 = 666.
188221204980 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
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 (188221204981) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (23) of ones.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23270497 + ... + 23278583.
It is an arithmetic number, because the mean of its divisors is an integer number (4113058040).
Almost surely, 2188221204980 is an apocalyptic number.
188221204980 is a gapful number since it is divisible by the number (10) 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 188221204980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296140178880).
188221204980 is an abundant number, since it is smaller than the sum of its proper divisors (404059152780).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
188221204980 is a wasteful number, since it uses less digits than its factorization.
188221204980 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 12900 (or 12886 counting only the distinct ones).
The product of its (nonzero) digits is 147456, while the sum is 45.
The spelling of 188221204980 in words is "one hundred eighty-eight billion, two hundred twenty-one million, two hundred four thousand, nine hundred eighty".
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