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16818345 = 325973853
BaseRepresentation
bin100000000101…
…0000010101001
31011122110102200
41000022002221
513301141340
61400250413
7262645035
oct100120251
934573380
1016818345
119547965
125770a09
13363b1ab
14233b1c5
151723330
hex100a0a9

16818345 has 24 divisors (see below), whose sum is σ = 29459976. Its totient is φ = 8875008.

The previous prime is 16818343. The next prime is 16818349. The reversal of 16818345 is 54381861.

It can be written as a sum of positive squares in 4 ways, for example, as 6007401 + 10810944 = 2451^2 + 3288^2 .

It is not a de Polignac number, because 16818345 - 21 = 16818343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16818343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2439 + ... + 6291.

It is an arithmetic number, because the mean of its divisors is an integer number (1227499).

Almost surely, 216818345 is an apocalyptic number.

16818345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16818345 is a deficient number, since it is larger than the sum of its proper divisors (12641631).

16818345 is a wasteful number, since it uses less digits than its factorization.

16818345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3961 (or 3958 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 16818345 is about 4101.0175566559. The cubic root of 16818345 is about 256.2090222002.

The spelling of 16818345 in words is "sixteen million, eight hundred eighteen thousand, three hundred forty-five".

Divisors: 1 3 5 9 15 45 97 291 485 873 1455 3853 4365 11559 19265 34677 57795 173385 373741 1121223 1868705 3363669 5606115 16818345