19713447936 has 864 divisors, whose sum is σ = 75447197280. Its totient is φ = 4904976384.

The previous prime is 19713447907. The next prime is 19713447947. The reversal of 19713447936 is 63974431791.

19713447936 is a `hidden beast` number, since 1 + 9 + 7 + 134 + 479 + 36 = 666.

It is a nude number because it is divisible by every one of its digits.

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 71 ways as a sum of consecutive naturals, for example, 270047196 + ... + 270047268.

It is an arithmetic number, because the mean of its divisors is an integer number (87323145).

Almost surely, 2^19713447936 is an apocalyptic number.

19713447936 is a gapful number since it is divisible by the number (16) 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 19713447936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37723598640).

19713447936 is an abundant number, since it is smaller than the sum of its proper divisors (55733749344).

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

19713447936 is a wasteful number, since it uses less digits than its factorization.

19713447936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 121 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 54.

The spelling of 19713447936 in words is "nineteen billion, seven hundred thirteen million, four hundred forty-seven thousand, nine hundred thirty-six".