In #HarikathaAmruthasaara Sri #JaganathaDasaru addresses Lord Ganesha as #EkaVimshatiModakapriya. There is a sampradaya 2 offer Ganapati # 21 bhakshya (Modaka) & worship with # 21 Pathra (Ekavimshati Pathra pooja)

What's the significance of # 21? A logical study (to be contd...)

Ekavimshati (# 21) arranged as,

(5) organs of perception (GnaAnendriya)
(5) organs of action (Karmendriya)
(5) Pancha Praana (Vital energy forces)
(5) Pancha Bhootha + Mind,

#Viswambhara roopi Paramatma who resides in all these elements is #Ganapati Upasana Moorti.
++

Numerologically #Moon is ruling planet of #(2) who is called Mano-kaAraka signifying Mind & is star lord of #Hastha constellation.

Ganesha Chaturthi (Vinayaka Vratha) is held during Bhadrapada Masa when generally Moon will be @ or nearer 2 Hastha star on the day of Chaturti; ++

Ganapathi is son of Sri Rudra Devaru who is Mano-abhimani devatha (Mano-niyaamaka) the controller of Mind.

Ganapathi (having visesha Vaayu aavesha) anugraha is very much required to control the wavering mind and keep it focused on Hari Sarvottama - Vaayu Jeevottama; ++

Astrologically, Hastha nakshathra falls in the zodiac sign Virgo (Kanya Raasi) which also partly houses Uttara-Phalguni nakshathra whose star Lord is Sun representing # (1); Number ONE signifies independence, leadership etc... ++