Base | Representation |
---|---|
bin | 100110100011… |
… | …0011010110011 |
3 | 1102000211210121 |
4 | 1031012122303 |
5 | 20133231004 |
6 | 2001111111 |
7 | 333536206 |
oct | 115063263 |
9 | 42024717 |
10 | 20211379 |
11 | 10455121 |
12 | 6928497 |
13 | 42586c6 |
14 | 298193d |
15 | 1b93854 |
hex | 13466b3 |
20211379 has 2 divisors, whose sum is σ = 20211380. Its totient is φ = 20211378.
The previous prime is 20211377. The next prime is 20211407. The reversal of 20211379 is 97311202.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 20211379 - 21 = 20211377 is a prime.
Together with 20211377, it forms a pair of twin primes.
It is not a weakly prime, because it can be changed into another prime (20211377) 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 as a sum of consecutive naturals, namely, 10105689 + 10105690.
It is an arithmetic number, because the mean of its divisors is an integer number (10105690).
Almost surely, 220211379 is an apocalyptic number.
20211379 is a deficient number, since it is larger than the sum of its proper divisors (1).
20211379 is an equidigital number, since it uses as much as digits as its factorization.
20211379 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 756, while the sum is 25.
The square root of 20211379 is about 4495.7067297590. The cubic root of 20211379 is about 272.3946971295.
The spelling of 20211379 in words is "twenty million, two hundred eleven thousand, three hundred seventy-nine".
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