I finally turned eighteen today. So let’s teach you something about this little number.
Eighteen is a composite number, its proper divisors being 1, 2, 3, 6 and 9. Three of these divisors (3, 6 and 9) add up to 18, hence 18 is a semiperfect number. Eighteen is the first inverted square-prime of the form p.q2. It is a heptagonal number, and as the sum of the first three pentagonal numbers, it is a pentagonal pyramidal number. It is also the sum of the totient function for the first seven integers. Eighteen is the second abundant number with the aliquot sum of 21 (117% in abundance) in the aliquot sequence (18,21,11,1,0) thus being the first composite number in the 11-aliquot tree. Eighteen is the aliquot sum of only one number the square 289. In base 10 it is a Harshad number. 18, aside from 0, is the only number that equals twice the sum of its decimal digits.
Interesting? No, not really, is it? Don’t know why I’m posting this, but now you can say you might have actually learned a little thing today through my page.
You know what would be a cool gift? If you’d all purchase a little piece of jewelry from my line :) That would be more satisfying than my birthday I suppose (I’m the kind of person that hates birthdays, especially my own…). You know what? I’ll even give you a little discount code. Enter BDAY10 to get 10% off! The code will be valid till May 2nd. God, we’ve bought too much cake by the way…
Top, skirt, tights: H&M
Belt: Vintage, gift
Heels: Prada
Jewelry: Vintage & renéesturme/jewelry
