Mammillaria Voburnensis:
They are originally from Mexico.
They belong to the cactus family, its genus is Mammillaria and it is a species of Voburnensis.
It's a cylindrical and globular cactus. It is about 20 cm tall. Adult plants are dark green in color and have many tubers around them, forming numerous stacked groups. They have many spines, about a cm long and very sharp all over their body.
At its apex there are very fine white villi and they have radial, longer, white and brown spines towards the apical surface.
They like exposure to the sun but also support semi-shade. With well-drained soil and little humidity. They resist long drying times very well, which do not affect their development.
The easiest way to reproduce it is by tubers.
This cactus was reproduced by me. Its reproduction, transplantation and care are carried out solely by me, with the knowledge acquired over the years of growing cacti and succulents.
These photographs are also my property.
I think I had this cactus too which flowered once. Does this cactus have a big white flower with fur looking branch? But I think the one I had didn't have thorns as close as yours. I am giving my new succulents and cactus artificial light, hopefully it gives them better light. My apartment does not have full sunlight and as you mentioned, they need sun to grow globularly. Hopefully this works. I am spraying water about once a week.