There's an 18x18 go board (as in IGO board, or Baduk Board, or Weiqi board) in front of you. I put one grain of rice on the first square, two on the second square, four on the third square, and so on. In the end, I put on the go board about 34 untrigintillion grains of rice. Meanwhile, there are 10 sexvigintillion atoms in the observable universe. So which number is bigger, 34 untrigintillion or 10 sexvigintillion? Beware, this could be a trick question, please read the questions carefully.