Today around the world there are 10,253 Bitcoin nodes, with one-fifth of them are located in the United States.
Node is any computer that participates in the Bitcoin network and uses a p2p protocol that allow nodes to communicate among themselves on the network and distribute information about transactions and blocks.
From these nodes, the network of blockchain is composed.Today, any user anywhere in the world can configure his own node if he has a powerful PC with an Internet connection. This makes Bitcoin (Bitcoin) decentralized.