19886473600 has 144 divisors (see below), whose sum is σ = 57146794380. Its totient is φ = 6818165760.

The previous prime is 19886473553. The next prime is 19886473627. The reversal of 19886473600 is 637468891.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 93387 + ... + 220213.

Almost surely, 2^19886473600 is an apocalyptic number.

19886473600 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 19886473600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28573397190).

19886473600 is an abundant number, since it is smaller than the sum of its proper divisors (37260320780).

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

19886473600 is a wasteful number, since it uses less digits than its factorization.

19886473600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126865 (or 126841 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 19886473600 in words is "nineteen billion, eight hundred eighty-six million, four hundred seventy-three thousand, six hundred".