19978799512933 has 4 divisors (see below), whose sum is σ = 20623276916608. Its totient is φ = 19334322109260.

The previous prime is 19978799512913. The next prime is 19978799512943. The reversal of 19978799512933 is 33921599787991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19978799512933 - 2⁹ = 19978799512421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19978799512913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322238701791 + ... + 322238701852.

It is an arithmetic number, because the mean of its divisors is an integer number (5155819229152).

Almost surely, 2^{19978799512933} is an apocalyptic number.

It is an amenable number.

19978799512933 is a deficient number, since it is larger than the sum of its proper divisors (644477403675).

19978799512933 is an equidigital number, since it uses as much as digits as its factorization.

19978799512933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644477403674.

The product of its digits is 2083248720, while the sum is 82.

The spelling of 19978799512933 in words is "nineteen trillion, nine hundred seventy-eight billion, seven hundred ninety-nine million, five hundred twelve thousand, nine hundred thirty-three".