19857480322820 has 24 divisors (see below), whose sum is σ = 47657952775104. Its totient is φ = 6808278967776.

The previous prime is 19857480322741. The next prime is 19857480322837. The reversal of 19857480322820 is 2822308475891.

It is a self number, because there is not a number n which added to its sum of digits gives 19857480322820.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70919572442 + ... + 70919572721.

It is an arithmetic number, because the mean of its divisors is an integer number (1985748032296).

Almost surely, 2^{19857480322820} is an apocalyptic number.

19857480322820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19857480322820 is an abundant number, since it is smaller than the sum of its proper divisors (27800472452284).

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

19857480322820 is a wasteful number, since it uses less digits than its factorization.

19857480322820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141839145179 (or 141839145177 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 59.

The spelling of 19857480322820 in words is "nineteen trillion, eight hundred fifty-seven billion, four hundred eighty million, three hundred twenty-two thousand, eight hundred twenty".