19996709045824 has 189 divisors, whose sum is σ = 47190283489323. Its totient is φ = 8382740518656.

The previous prime is 19996709045813. The next prime is 19996709045837. The reversal of 19996709045824 is 42854090769991.

The square root of 19996709045824 is 4471768.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 11769692527 + ... + 11769694225.

Almost surely, 2^{19996709045824} is an apocalyptic number.

19996709045824 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19996709045824 is the 4471768-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19996709045824

19996709045824 is an abundant number, since it is smaller than the sum of its proper divisors (27193574443499).

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

19996709045824 is an frugal number, since it uses more digits than its factorization.

19996709045824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518 (or 1755 counting only the distinct ones).

The product of its (nonzero) digits is 352719360, while the sum is 73.

The spelling of 19996709045824 in words is "nineteen trillion, nine hundred ninety-six billion, seven hundred nine million, forty-five thousand, eight hundred twenty-four".