In astrology-numerology connection does Venus represent number 2
No, you're looking at the Moon is designated a number 2, Venus is a 6. They are 2 examples of femininity in astrology, the Sun, Mars, Jupiter and Saturn are treated more like masculine planets. Mercury, Uranus and Neptune should be feminine or they appear to have both genders (and so can Pluto). I believe the newer "planets" Eris, Ceres and Sedna are clearly feminine. The planets divided by gender are (and mentions of the planetoid chiron and Earth's satellite Lilith):
Masculine: Sun, Mars, Jupiter and Saturn.
Mas/Fem: Mercury and Uranus. (and Chiron).
Feminine: Moon, Venus, Ceres and Sedna.
Fem/Mas: Eris and Pluto (and Lilith).
And the 12 signs of the astrological zodiac:
Masculine: Aries, Gemini, Leo, Libra, Sagittarius and Aquarius.
Feminine: Taurus, Cancer, Virgo, Scorpio, Capricorn and Pisces.
However, it appears the Air signs are a Masculine/Feminine type:
Gemini (ruled by Mercury), Libra (by Venus) and Aquarius (by Uranus).
And the 2nd half of the year "feminine" signs appear kinda masculine:
Scorpio (ruled by Pluto), Capricorn (by Saturn) and Pisces (by Jupiter).
And parazodiacs Ophiuchus and Orion are hard to define, there are proposals to assign Chiron and Lilith for Ophiuchus and Orion. And Ceres for Cancer ruled by the Moon, Virgo by Mercury and Taurus ruled by Venus; Eris for Gemini ruled by Mercury, Leo by the sun, and Libra ruled by Venus, and maybe include Cetus and the most esoteric constellation Draco, Sedna could rule these parazodiacs.