19845713712 has 160 divisors (see below), whose sum is σ = 59415840000. Its totient is φ = 5644753920.

The previous prime is 19845713659. The next prime is 19845713729. The reversal of 19845713712 is 21731754891.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1084414 + ... + 1102562.

It is an arithmetic number, because the mean of its divisors is an integer number (371349000).

Almost surely, 2^19845713712 is an apocalyptic number.

19845713712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19845713712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29707920000).

19845713712 is an abundant number, since it is smaller than the sum of its proper divisors (39570126288).

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

19845713712 is a wasteful number, since it uses less digits than its factorization.

19845713712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18299 (or 18293 counting only the distinct ones).

The product of its digits is 423360, while the sum is 48.

The spelling of 19845713712 in words is "nineteen billion, eight hundred forty-five million, seven hundred thirteen thousand, seven hundred twelve".