Base | Representation |
---|---|
bin | 101000000100… |
… | …0110111101000 |
3 | 1110112022100110 |
4 | 1100020313220 |
5 | 20334222343 |
6 | 2030134320 |
7 | 343364241 |
oct | 120106750 |
9 | 43468313 |
10 | 21007848 |
11 | 10949564 |
12 | 70513a0 |
13 | 44770a4 |
14 | 2b0bcc8 |
15 | 1c9e833 |
hex | 1408de8 |
21007848 has 16 divisors (see below), whose sum is σ = 52519680. Its totient is φ = 7002608.
The previous prime is 21007843. The next prime is 21007849. The reversal of 21007848 is 84870012.
It is a super-2 number, since 2×210078482 = 882659355182208, which contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (21007843) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437640 + ... + 437687.
It is an arithmetic number, because the mean of its divisors is an integer number (3282480).
Almost surely, 221007848 is an apocalyptic number.
It is an amenable number.
21007848 is an abundant number, since it is smaller than the sum of its proper divisors (31511832).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21007848 is a wasteful number, since it uses less digits than its factorization.
21007848 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 875336 (or 875332 counting only the distinct ones).
The product of its (nonzero) digits is 3584, while the sum is 30.
The square root of 21007848 is about 4583.4319019704. The cubic root of 21007848 is about 275.9267816703.
The spelling of 21007848 in words is "twenty-one million, seven thousand, eight hundred forty-eight".
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