19701765993 has 96 divisors (see below), whose sum is σ = 33373344000. Its totient is φ = 10329306624.

The previous prime is 19701765991. The next prime is 19701766043. The reversal of 19701765993 is 39956710791.

It is not a de Polignac number, because 19701765993 - 2¹ = 19701765991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19701765991) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 48170373 + ... + 48170781.

It is an arithmetic number, because the mean of its divisors is an integer number (347639000).

Almost surely, 2^19701765993 is an apocalyptic number.

19701765993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19701765993 is a deficient number, since it is larger than the sum of its proper divisors (13671578007).

19701765993 is a wasteful number, since it uses less digits than its factorization.

19701765993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736 (or 709 counting only the distinct ones).

The product of its (nonzero) digits is 3214890, while the sum is 57.

The spelling of 19701765993 in words is "nineteen billion, seven hundred one million, seven hundred sixty-five thousand, nine hundred ninety-three".