Toner and image forming apparatus

A toner comprising

• toner particles, wherein
• the toner particles each include a toner mother particle and external additive particles attached to a surface of the toner mother particle,
• the external additive particles include fluororesin particles, specific external additive particles, and silica particles,
• the specific external additive particles contain barium titanate or strontium titanate,
• the silica particles have a detachment fraction of at least 5% by mass and no greater than 22% by mass, and
• the detachment fraction of the silica particles is a percentage (100×M2/M1) of a mass M2 of silica particles of the silica particles that have separated from the toner mother particles after ultrasonication to a mass M1 of the silica particles included in the toner particles before the ultrasonication, the ultrasonication being application of ultrasonic vibration with a frequency of 20 kHz and an output of 225 W for 60 seconds to a mixed liquid of 5 g of the toner and 105.5 g of a nonionic surfactant-containing aqueous solution containing 0.55 g of a nonionic surfactant.