Base | Representation |
---|---|
bin | 100011100110… |
… | …0101111101101 |
3 | 1022010020210011 |
4 | 1013030233231 |
5 | 14234230204 |
6 | 1504013221 |
7 | 314434150 |
oct | 107145755 |
9 | 38106704 |
10 | 18664429 |
11 | a598953 |
12 | 6301211 |
13 | 3b36554 |
14 | 269bc97 |
15 | 198a304 |
hex | 11ccbed |
18664429 has 8 divisors (see below), whose sum is σ = 22066560. Its totient is φ = 15446256.
The previous prime is 18664417. The next prime is 18664433. The reversal of 18664429 is 92446681.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 18664429 - 29 = 18663917 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 18664391 and 18664400.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (18664229) by changing a digit.
It is an upside-down number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45769 + ... + 46174.
It is an arithmetic number, because the mean of its divisors is an integer number (2758320).
Almost surely, 218664429 is an apocalyptic number.
It is an amenable number.
18664429 is a deficient number, since it is larger than the sum of its proper divisors (3402131).
18664429 is an equidigital number, since it uses as much as digits as its factorization.
18664429 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 91979.
The product of its digits is 82944, while the sum is 40.
The square root of 18664429 is about 4320.2348315803. The cubic root of 18664429 is about 265.2598803366.
The spelling of 18664429 in words is "eighteen million, six hundred sixty-four thousand, four hundred twenty-nine".
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