19408743912 has 64 divisors (see below), whose sum is σ = 48686201280. Its totient is φ = 6447716352.

The previous prime is 19408743901. The next prime is 19408743917. The reversal of 19408743912 is 21934780491.

It is not an unprimeable number, because it can be changed into a prime (19408743917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13356978 + ... + 13358430.

It is an arithmetic number, because the mean of its divisors is an integer number (760721895).

Almost surely, 2^19408743912 is an apocalyptic number.

19408743912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19408743912 is an abundant number, since it is smaller than the sum of its proper divisors (29277457368).

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

19408743912 is a wasteful number, since it uses less digits than its factorization.

19408743912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962 (or 2958 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 19408743912 in words is "nineteen billion, four hundred eight million, seven hundred forty-three thousand, nine hundred twelve".