The next time you hear about the sway that Ivanka Trump holds over her father and what a powerful advocate for equal opportunity she is, I want you to remember these numbers:

Twenty. That’s how many men are in, or poised to join, the president’s cabinet.

Four. That’s how many women.

Barack Obama’s first cabinet included seven. Bill Clinton’s, six. George W. Bush’s, four, same as Trump’s, but that was 16 years ago, and he didn’t have an adult daughter who styled herself as both an influential adviser and a feminist hero. Where precisely is the Ivanka Effect?

She won’t be engaging this riddle in her new book, “Women Who Work,” due out in early May, and I say that not because I know what’s in it — I don’t — but because I know Ivanka, or at least I’ve been watching her closely for a while. She doesn’t take responsibility, not where dear old Dad is concerned. She takes advantage, all the while asking us to be grateful for her presence beside him.

When he behaves, word goes out that she or her husband, Jared Kushner, had his ear. When he doesn’t, word goes out that it wasn’t their fault, that they can do only so much and that if they hadn’t valiantly moved to Washington, well, think about how much worse off we’d all be.