| Base | Representation |
|---|---|
| bin | 1001010100111000100101… |
| … | …00100101011111000010000 |
| 3 | 2200121121202011122001100100 |
| 4 | 10222130102210223320100 |
| 5 | 10142003440243221300 |
| 6 | 111341334220452400 |
| 7 | 4214465461321665 |
| oct | 452342244537020 |
| 9 | 80547664561310 |
| 10 | 20508780445200 |
| 11 | 65977a7997a13 |
| 12 | 23728a50aa100 |
| 13 | b59c7b56bbc8 |
| 14 | 50c8b7663a6c |
| 15 | 258731777700 |
| hex | 12a71292be10 |
20508780445200 has 360 divisors, whose sum is σ = 72950313834216. Its totient is φ = 5332451328000.
The previous prime is 20508780445193. The next prime is 20508780445217. The reversal of 20508780445200 is 254408780502.
20508780445200 is a `hidden beast` number, since 2 + 0 + 5 + 0 + 8 + 7 + 80 + 44 + 520 + 0 = 666.
It can be written as a sum of positive squares in 12 ways, for example, as 2169693648144 + 18339086797056 = 1472988^2 + 4282416^2 .
It is a tau number, because it is divible by the number of its divisors (360).
It is a super-2 number, since 2×205087804452002 (a number of 27 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (45).
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 253979232 + ... + 254059968.
Almost surely, 220508780445200 is an apocalyptic number.
20508780445200 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 20508780445200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36475156917108).
20508780445200 is an abundant number, since it is smaller than the sum of its proper divisors (52441533389016).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20508780445200 is a wasteful number, since it uses less digits than its factorization.
20508780445200 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 82523 (or 82509 counting only the distinct ones).
The product of its (nonzero) digits is 716800, while the sum is 45.
The spelling of 20508780445200 in words is "twenty trillion, five hundred eight billion, seven hundred eighty million, four hundred forty-five thousand, two hundred".
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