19996725600 has 216 divisors, whose sum is σ = 70623057960. Its totient is φ = 5324175360.

The previous prime is 19996725589. The next prime is 19996725613. The reversal of 19996725600 is 652769991.

19996725600 is a `hidden beast` number, since 1 + 9 + 9 + 9 + 6 + 7 + 25 + 600 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5664636 + ... + 5668164.

Almost surely, 2^19996725600 is an apocalyptic number.

19996725600 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 19996725600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35311528980).

19996725600 is an abundant number, since it is smaller than the sum of its proper divisors (50626332360).

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

19996725600 is a wasteful number, since it uses less digits than its factorization.

19996725600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4342 (or 4326 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 54.

The spelling of 19996725600 in words is "nineteen billion, nine hundred ninety-six million, seven hundred twenty-five thousand, six hundred".