19479997313280 has 432 divisors, whose sum is σ = 77047011385344. Its totient is φ = 4451423109120.

The previous prime is 19479997313269. The next prime is 19479997313303. The reversal of 19479997313280 is 8231379997491.

19479997313280 is a `hidden beast` number, since 1 + 9 + 479 + 9 + 9 + 73 + 1 + 3 + 2 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 19479997313199 and 19479997313208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 335191425 + ... + 335249535.

It is an arithmetic number, because the mean of its divisors is an integer number (178349563392).

Almost surely, 2^{19479997313280} is an apocalyptic number.

19479997313280 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 19479997313280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38523505692672).

19479997313280 is an abundant number, since it is smaller than the sum of its proper divisors (57567014072064).

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

19479997313280 is a wasteful number, since it uses less digits than its factorization.

19479997313280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62302 (or 62285 counting only the distinct ones).

The product of its (nonzero) digits is 185177664, while the sum is 72.

The spelling of 19479997313280 in words is "nineteen trillion, four hundred seventy-nine billion, nine hundred ninety-seven million, three hundred thirteen thousand, two hundred eighty".