19659695040 has 168 divisors, whose sum is σ = 67683814848. Its totient is φ = 5237729280.

The previous prime is 19659695017. The next prime is 19659695047. The reversal of 19659695040 is 4059695691.

19659695040 is a `hidden beast` number, since 1 + 9 + 6 + 596 + 9 + 5 + 0 + 40 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19659695047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3974809 + ... + 3979751.

Almost surely, 2^19659695040 is an apocalyptic number.

19659695040 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 19659695040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33841907424).

19659695040 is an abundant number, since it is smaller than the sum of its proper divisors (48024119808).

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

19659695040 is a wasteful number, since it uses less digits than its factorization.

19659695040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6347 (or 6334 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 54.

The spelling of 19659695040 in words is "nineteen billion, six hundred fifty-nine million, six hundred ninety-five thousand, forty".