19845423360 has 432 divisors, whose sum is σ = 81928425600. Its totient is φ = 4535709696.

The previous prime is 19845423337. The next prime is 19845423361. The reversal of 19845423360 is 6332454891.

19845423360 is a `hidden beast` number, since 19 + 8 + 4 + 542 + 33 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (432).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (19845423361) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1687581 + ... + 1699299.

Almost surely, 2^19845423360 is an apocalyptic number.

19845423360 is a gapful number since it is divisible by the number (10) 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 19845423360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40964212800).

19845423360 is an abundant number, since it is smaller than the sum of its proper divisors (62083002240).

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

19845423360 is a wasteful number, since it uses less digits than its factorization.

19845423360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11763 (or 11736 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 19845423360 in words is "nineteen billion, eight hundred forty-five million, four hundred twenty-three thousand, three hundred sixty".