19593978993 has 12 divisors (see below), whose sum is σ = 28566924048. Its totient is φ = 12940571160.

The previous prime is 19593978977. The next prime is 19593979049. The reversal of 19593978993 is 39987939591.

It is not a de Polignac number, because 19593978993 - 2⁴ = 19593978977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19593978793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10172443 + ... + 10174368.

It is an arithmetic number, because the mean of its divisors is an integer number (2380577004).

Almost surely, 2^19593978993 is an apocalyptic number.

It is an amenable number.

19593978993 is a deficient number, since it is larger than the sum of its proper divisors (8972945055).

19593978993 is a wasteful number, since it uses less digits than its factorization.

19593978993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20346924 (or 20346921 counting only the distinct ones).

The product of its digits is 148803480, while the sum is 72.

The spelling of 19593978993 in words is "nineteen billion, five hundred ninety-three million, nine hundred seventy-eight thousand, nine hundred ninety-three".