19747364560 has 720 divisors, whose sum is σ = 64975841280. Its totient is φ = 5535129600.

The previous prime is 19747364521. The next prime is 19747364641. The reversal of 19747364560 is 6546374791.

It is a junction number, because it is equal to n+sod(n) for n = 19747364498 and 19747364507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 249966601 + ... + 249966679.

It is an arithmetic number, because the mean of its divisors is an integer number (90244224).

Almost surely, 2^19747364560 is an apocalyptic number.

19747364560 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 19747364560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32487920640).

19747364560 is an abundant number, since it is smaller than the sum of its proper divisors (45228476720).

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

19747364560 is a wasteful number, since it uses less digits than its factorization.

19747364560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 52.

The spelling of 19747364560 in words is "nineteen billion, seven hundred forty-seven million, three hundred sixty-four thousand, five hundred sixty".