Base | Representation |
---|---|
bin | 101010001110… |
… | …1010001110101 |
3 | 1112122211101210 |
4 | 1110131101311 |
5 | 21131440041 |
6 | 2110312033 |
7 | 356121111 |
oct | 124352165 |
9 | 45584353 |
10 | 22140021 |
11 | 11552142 |
12 | 74b8619 |
13 | 4782507 |
14 | 2d24741 |
15 | 1e25016 |
hex | 151d475 |
22140021 has 16 divisors (see below), whose sum is σ = 30735360. Its totient is φ = 14159040.
The previous prime is 22139993. The next prime is 22140029. The reversal of 22140021 is 12004122.
It is not a de Polignac number, because 22140021 - 210 = 22138997 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 22139979 and 22140006.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (22140029) 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 15 ways as a sum of consecutive naturals, for example, 14316 + ... + 15786.
It is an arithmetic number, because the mean of its divisors is an integer number (1920960).
Almost surely, 222140021 is an apocalyptic number.
It is an amenable number.
22140021 is a deficient number, since it is larger than the sum of its proper divisors (8595339).
22140021 is a wasteful number, since it uses less digits than its factorization.
22140021 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1676.
The product of its (nonzero) digits is 32, while the sum is 12.
The square root of 22140021 is about 4705.3183739254. The cubic root of 22140021 is about 280.7971374738.
Adding to 22140021 its reverse (12004122), we get a palindrome (34144143).
The spelling of 22140021 in words is "twenty-two million, one hundred forty thousand, twenty-one".
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