19578282240 has 144 divisors (see below), whose sum is σ = 68212662336. Its totient is φ = 4746240000.

The previous prime is 19578282209. The next prime is 19578282247. The reversal of 19578282240 is 4228287591.

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

It is a self number, because there is not a number n which added to its sum of digits gives 19578282240.

It is not an unprimeable number, because it can be changed into a prime (19578282247) 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, 189511 + ... + 273990.

It is an arithmetic number, because the mean of its divisors is an integer number (473699044).

Almost surely, 2^19578282240 is an apocalyptic number.

19578282240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19578282240 is an abundant number, since it is smaller than the sum of its proper divisors (48634380096).

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

19578282240 is a wasteful number, since it uses less digits than its factorization.

19578282240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463536 (or 463522 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 19578282240 in words is "nineteen billion, five hundred seventy-eight million, two hundred eighty-two thousand, two hundred forty".