19890794963 has 8 divisors (see below), whose sum is σ = 21424049808. Its totient is φ = 18357996384.

The previous prime is 19890794927. The next prime is 19890795013. The reversal of 19890794963 is 36949709891.

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

It is not a de Polignac number, because 19890794963 - 2¹⁰ = 19890793939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19890794963.

It is not an unprimeable number, because it can be changed into a prime (19890794263) 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 7 ways as a sum of consecutive naturals, for example, 20681 + ... + 200522.

It is an arithmetic number, because the mean of its divisors is an integer number (2678006226).

Almost surely, 2^19890794963 is an apocalyptic number.

19890794963 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

19890794963 is a deficient number, since it is larger than the sum of its proper divisors (1533254845).

19890794963 is a wasteful number, since it uses less digits than its factorization.

19890794963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228133.

The product of its (nonzero) digits is 26453952, while the sum is 65.

The spelling of 19890794963 in words is "nineteen billion, eight hundred ninety million, seven hundred ninety-four thousand, nine hundred sixty-three".