Base | Representation |
---|---|
bin | 10010110100101100… |
… | …011110110010101000 |
3 | 1221011120100221122200 |
4 | 102310230132302220 |
5 | 312343111203040 |
6 | 13141321020200 |
7 | 1313600210403 |
oct | 226454366250 |
9 | 57146327580 |
10 | 20211428520 |
11 | 8631908438 |
12 | 3b00924660 |
13 | 1ba1433a7a |
14 | d9a400d3a |
15 | 7d45d1630 |
hex | 4b4b1eca8 |
20211428520 has 192 divisors, whose sum is σ = 70014896640. Its totient is φ = 5038848000.
The previous prime is 20211428491. The next prime is 20211428527. The reversal of 20211428520 is 2582411202.
20211428520 is a `hidden beast` number, since 2 + 0 + 2 + 114 + 28 + 520 = 666.
It is not an unprimeable number, because it can be changed into a prime (20211428527) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 913185 + ... + 935055.
It is an arithmetic number, because the mean of its divisors is an integer number (364660920).
Almost surely, 220211428520 is an apocalyptic number.
20211428520 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 20211428520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35007448320).
20211428520 is an abundant number, since it is smaller than the sum of its proper divisors (49803468120).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20211428520 is a wasteful number, since it uses less digits than its factorization.
20211428520 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 22056 (or 22049 counting only the distinct ones).
The product of its (nonzero) digits is 2560, while the sum is 27.
Adding to 20211428520 its reverse (2582411202), we get a palindrome (22793839722).
The spelling of 20211428520 in words is "twenty billion, two hundred eleven million, four hundred twenty-eight thousand, five hundred twenty".
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