Base | Representation |
---|---|
bin | 10010101001010110… |
… | …111001101001110001 |
3 | 1220200022110110100210 |
4 | 102221112321221301 |
5 | 312000413101001 |
6 | 13110404134333 |
7 | 1306100402424 |
oct | 225126715161 |
9 | 56608413323 |
10 | 20021222001 |
11 | 8544504470 |
12 | 3a690973a9 |
13 | 1b70bc8331 |
14 | d7d04b9bb |
15 | 7c2a5ddd6 |
hex | 4a95b9a71 |
20021222001 has 16 divisors (see below), whose sum is σ = 30061191168. Its totient is φ = 11742651600.
The previous prime is 20021221991. The next prime is 20021222017. The reversal of 20021222001 is 10022212002.
It is not a de Polignac number, because 20021222001 - 219 = 20020697713 is a prime.
It is not an unprimeable number, because it can be changed into a prime (20021222041) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9784521 + ... + 9786566.
It is an arithmetic number, because the mean of its divisors is an integer number (1878824448).
Almost surely, 220021222001 is an apocalyptic number.
It is an amenable number.
20021222001 is a deficient number, since it is larger than the sum of its proper divisors (10039969167).
20021222001 is a wasteful number, since it uses less digits than its factorization.
20021222001 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 19571132.
The product of its (nonzero) digits is 32, while the sum is 12.
Adding to 20021222001 its reverse (10022212002), we get a palindrome (30043434003).
Subtracting from 20021222001 its reverse (10022212002), we obtain a palindrome (9999009999).
The spelling of 20021222001 in words is "twenty billion, twenty-one million, two hundred twenty-two thousand, one".
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