19713634452 has 216 divisors, whose sum is σ = 57536810240. Its totient is φ = 5668392960.

The previous prime is 19713634387. The next prime is 19713634453. The reversal of 19713634452 is 25443631791.

19713634452 is a `hidden beast` number, since 1 + 9 + 7 + 1 + 3 + 634 + 4 + 5 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 19713634398 and 19713634407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19713634453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6126348 + ... + 6129564.

Almost surely, 2^19713634452 is an apocalyptic number.

19713634452 is a gapful number since it is divisible by the number (12) 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 19713634452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28768405120).

19713634452 is an abundant number, since it is smaller than the sum of its proper divisors (37823175788).

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

19713634452 is a wasteful number, since it uses less digits than its factorization.

19713634452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3311 (or 3289 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The spelling of 19713634452 in words is "nineteen billion, seven hundred thirteen million, six hundred thirty-four thousand, four hundred fifty-two".