19963093460843 has 4 divisors (see below), whose sum is σ = 21498716034768. Its totient is φ = 18427470886920.

The previous prime is 19963093460839. The next prime is 19963093460879. The reversal of 19963093460843 is 34806439036991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19963093460843 - 2² = 19963093460839 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 19963093460843.

It is not an unprimeable number, because it can be changed into a prime (19963093463843) 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 3 ways as a sum of consecutive naturals, for example, 767811286943 + ... + 767811286968.

It is an arithmetic number, because the mean of its divisors is an integer number (5374679008692).

Almost surely, 2^{19963093460843} is an apocalyptic number.

19963093460843 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

19963093460843 is a deficient number, since it is larger than the sum of its proper divisors (1535622573925).

19963093460843 is a wasteful number, since it uses less digits than its factorization.

19963093460843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535622573924.

The product of its (nonzero) digits is 90699264, while the sum is 65.

The spelling of 19963093460843 in words is "nineteen trillion, nine hundred sixty-three billion, ninety-three million, four hundred sixty thousand, eight hundred forty-three".