Base | Representation |
---|---|
bin | 100110001011… |
… | …110110100101 |
3 | 200211120011112 |
4 | 212023312211 |
5 | 10030310041 |
6 | 554314405 |
7 | 151040510 |
oct | 46136645 |
9 | 20746145 |
10 | 10010021 |
11 | 571774a |
12 | 3428a05 |
13 | 20c62b8 |
14 | 1487d77 |
15 | d2adeb |
hex | 98bda5 |
10010021 has 8 divisors (see below), whose sum is σ = 11475264. Its totient is φ = 8553600.
The previous prime is 10009981. The next prime is 10010023. The reversal of 10010021 is 12001001.
It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-10010021 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 10009987 and 10010014.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (10010023) 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 7 ways as a sum of consecutive naturals, for example, 446 + ... + 4496.
It is an arithmetic number, because the mean of its divisors is an integer number (1434408).
Almost surely, 210010021 is an apocalyptic number.
It is an amenable number.
10010021 is a deficient number, since it is larger than the sum of its proper divisors (1465243).
10010021 is an equidigital number, since it uses as much as digits as its factorization.
10010021 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4411.
The product of its (nonzero) digits is 2, while the sum is 5.
The square root of 10010021 is about 3163.8617226421. The cubic root of 10010021 is about 215.5154102778.
Adding to 10010021 its reverse (12001001), we get a palindrome (22011022).
Multiplying 10010021 by its reverse (12001001), we get a palindrome (120130272031021).
The spelling of 10010021 in words is "ten million, ten thousand, twenty-one".
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