19212404388 has 48 divisors (see below), whose sum is σ = 45701542656. Its totient is φ = 6279619840.

The previous prime is 19212404377. The next prime is 19212404399. The reversal of 19212404388 is 88340421291.

It is an interprime number because it is at equal distance from previous prime (19212404377) and next prime (19212404399).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1208773 + ... + 1224563.

It is an arithmetic number, because the mean of its divisors is an integer number (952115472).

Almost surely, 2^19212404388 is an apocalyptic number.

It is an amenable number.

19212404388 is an abundant number, since it is smaller than the sum of its proper divisors (26489138268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19212404388 is a wasteful number, since it uses less digits than its factorization.

19212404388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17764 (or 17762 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The spelling of 19212404388 in words is "nineteen billion, two hundred twelve million, four hundred four thousand, three hundred eighty-eight".