19318193544 has 128 divisors (see below), whose sum is σ = 52608205440. Its totient is φ = 5876140032.

The previous prime is 19318193527. The next prime is 19318193569. The reversal of 19318193544 is 44539181391.

It is a junction number, because it is equal to n+sod(n) for n = 19318193493 and 19318193502.

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 31 ways as a sum of consecutive naturals, for example, 12095754 + ... + 12097350.

It is an arithmetic number, because the mean of its divisors is an integer number (411001605).

Almost surely, 2^19318193544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19318193544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26304102720).

19318193544 is an abundant number, since it is smaller than the sum of its proper divisors (33290011896).

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

19318193544 is a wasteful number, since it uses less digits than its factorization.

19318193544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2039 (or 2035 counting only the distinct ones).

The product of its digits is 466560, while the sum is 48.

The spelling of 19318193544 in words is "nineteen billion, three hundred eighteen million, one hundred ninety-three thousand, five hundred forty-four".