19693375680 has 448 divisors, whose sum is σ = 71340756480. Its totient is φ = 4558848000.

The previous prime is 19693375661. The next prime is 19693375687. The reversal of 19693375680 is 8657339691.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 19693375680.

It is not an unprimeable number, because it can be changed into a prime (19693375687) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32767380 + ... + 32767980.

It is an arithmetic number, because the mean of its divisors is an integer number (159242760).

Almost surely, 2^19693375680 is an apocalyptic number.

19693375680 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 19693375680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35670378240).

19693375680 is an abundant number, since it is smaller than the sum of its proper divisors (51647380800).

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

19693375680 is a wasteful number, since it uses less digits than its factorization.

19693375680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768 (or 758 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 57.

The spelling of 19693375680 in words is "nineteen billion, six hundred ninety-three million, three hundred seventy-five thousand, six hundred eighty".