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18248069 = 75874441
BaseRepresentation
bin100010110011…
…1000110000101
31021100002122102
41011213012011
514132414234
61451041445
7311051240
oct105470605
937302572
1018248069
11a334054
126140285
133a1bb98
1425d0257
151906c7e
hex1167185

18248069 has 8 divisors (see below), whose sum is σ = 20895168. Its totient is φ = 15611040.

The previous prime is 18248063. The next prime is 18248071. The reversal of 18248069 is 96084281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18248069 - 216 = 18182533 is a prime.

It is a super-2 number, since 2×182480692 = 665984044457522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18248063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1889 + ... + 6329.

It is an arithmetic number, because the mean of its divisors is an integer number (2611896).

Almost surely, 218248069 is an apocalyptic number.

It is an amenable number.

18248069 is a deficient number, since it is larger than the sum of its proper divisors (2647099).

18248069 is an equidigital number, since it uses as much as digits as its factorization.

18248069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5035.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 18248069 is about 4271.7758602249. The cubic root of 18248069 is about 263.2725852857.

The spelling of 18248069 in words is "eighteen million, two hundred forty-eight thousand, sixty-nine".

Divisors: 1 7 587 4109 4441 31087 2606867 18248069