19794864433 has 8 divisors (see below), whose sum is σ = 19849788000. Its totient is φ = 19740002880.

The previous prime is 19794864421. The next prime is 19794864437. The reversal of 19794864433 is 33446849791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19794864433 is a prime.

It is a super-2 number, since 2×19794864433² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19794864437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 664566 + ... + 693712.

It is an arithmetic number, because the mean of its divisors is an integer number (2481223500).

Almost surely, 2^19794864433 is an apocalyptic number.

It is an amenable number.

19794864433 is a deficient number, since it is larger than the sum of its proper divisors (54923567).

19794864433 is a wasteful number, since it uses less digits than its factorization.

19794864433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31007.

The product of its digits is 15676416, while the sum is 58.

The spelling of 19794864433 in words is "nineteen billion, seven hundred ninety-four million, eight hundred sixty-four thousand, four hundred thirty-three".