19447941399040 has 640 divisors, whose sum is σ = 58544513482752. Its totient is φ = 6019230597120.

The previous prime is 19447941399037. The next prime is 19447941399049. The reversal of 19447941399040 is 4099314974491.

19447941399040 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (64).

It is not an unprimeable number, because it can be changed into a prime (19447941399049) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23630548069 + ... + 23630548891.

Almost surely, 2^{19447941399040} is an apocalyptic number.

19447941399040 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 19447941399040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29272256741376).

19447941399040 is an abundant number, since it is smaller than the sum of its proper divisors (39096572083712).

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

19447941399040 is a wasteful number, since it uses less digits than its factorization.

19447941399040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560 (or 1544 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 64.

The spelling of 19447941399040 in words is "nineteen trillion, four hundred forty-seven billion, nine hundred forty-one million, three hundred ninety-nine thousand, forty".