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18000343 is a prime number
BaseRepresentation
bin100010010101…
…0100111010111
31020212111211101
41010222213113
514102002333
61441450531
7306000064
oct104524727
936774741
1018000343
11a184a19
126040a47
1339631ba
142567c6b
1518a867d
hex112a9d7

18000343 has 2 divisors, whose sum is σ = 18000344. Its totient is φ = 18000342.

The previous prime is 18000319. The next prime is 18000347. The reversal of 18000343 is 34300081.

It is a strong prime.

It is an emirp because it is prime and its reverse (34300081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18000343 - 29 = 17999831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18000343.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18000347) 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, 9000171 + 9000172.

It is an arithmetic number, because the mean of its divisors is an integer number (9000172).

Almost surely, 218000343 is an apocalyptic number.

18000343 is a deficient number, since it is larger than the sum of its proper divisors (1).

18000343 is an equidigital number, since it uses as much as digits as its factorization.

18000343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 18000343 is about 4242.6811098644. The cubic root of 18000343 is about 262.0758040664.

The spelling of 18000343 in words is "eighteen million, three hundred forty-three", and thus it is an aban number.