8421963823 has 32 divisors (see below), whose sum is σ = 10615449600. Its totient is φ = 6504765696.

The previous prime is 8421963821. The next prime is 8421963833. The reversal of 8421963823 is 3283691248.

It is not a de Polignac number, because 8421963823 - 2¹ = 8421963821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421963821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 633240 + ... + 646402.

It is an arithmetic number, because the mean of its divisors is an integer number (331732800).

Almost surely, 2^8421963823 is an apocalyptic number.

8421963823 is a deficient number, since it is larger than the sum of its proper divisors (2193485777).

8421963823 is a wasteful number, since it uses less digits than its factorization.

8421963823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13351.

The product of its digits is 497664, while the sum is 46.

The square root of 8421963823 is about 91771.2581530841. The cubic root of 8421963823 is about 2034.5629136916.

The spelling of 8421963823 in words is "eight billion, four hundred twenty-one million, nine hundred sixty-three thousand, eight hundred twenty-three".