19993086720 has 432 divisors, whose sum is σ = 73424175552. Its totient is φ = 5012029440.

The previous prime is 19993086613. The next prime is 19993086721. The reversal of 19993086720 is 2768039991.

It is not an unprimeable number, because it can be changed into a prime (19993086721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16161942 + ... + 16163178.

Almost surely, 2^19993086720 is an apocalyptic number.

19993086720 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 19993086720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36712087776).

19993086720 is an abundant number, since it is smaller than the sum of its proper divisors (53431088832).

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

19993086720 is a wasteful number, since it uses less digits than its factorization.

19993086720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348 (or 1331 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The spelling of 19993086720 in words is "nineteen billion, nine hundred ninety-three million, eighty-six thousand, seven hundred twenty".