19717273344 has 72 divisors (see below), whose sum is σ = 52958363920. Its totient is φ = 6512099328.

The previous prime is 19717273343. The next prime is 19717273349. The reversal of 19717273344 is 44337271791.

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

It is a junction number, because it is equal to n+sod(n) for n = 19717273293 and 19717273302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19717273343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34057 + ... + 201480.

Almost surely, 2^19717273344 is an apocalyptic number.

It is an amenable number.

19717273344 is an abundant number, since it is smaller than the sum of its proper divisors (33241090576).

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

19717273344 is a wasteful number, since it uses less digits than its factorization.

19717273344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235665 (or 235651 counting only the distinct ones).

The product of its digits is 889056, while the sum is 48.

The spelling of 19717273344 in words is "nineteen billion, seven hundred seventeen million, two hundred seventy-three thousand, three hundred forty-four".