19744294660 has 12 divisors (see below), whose sum is σ = 41463018828. Its totient is φ = 7897717856.

The previous prime is 19744294607. The next prime is 19744294741. The reversal of 19744294660 is 6649244791.

It can be written as a sum of positive squares in 2 ways, for example, as 4942652416 + 14801642244 = 70304^2 + 121662^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19744294598 and 19744294607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493607347 + ... + 493607386.

It is an arithmetic number, because the mean of its divisors is an integer number (3455251569).

Almost surely, 2^19744294660 is an apocalyptic number.

19744294660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19744294660 is an abundant number, since it is smaller than the sum of its proper divisors (21718724168).

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

19744294660 is a wasteful number, since it uses less digits than its factorization.

19744294660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987214742 (or 987214740 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 19744294660 in words is "nineteen billion, seven hundred forty-four million, two hundred ninety-four thousand, six hundred sixty".