8821218428423 has 4 divisors (see below), whose sum is σ = 8822848069608. Its totient is φ = 8819588787240.

The previous prime is 8821218428417. The next prime is 8821218428497. The reversal of 8821218428423 is 3248248121288.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8821218428423 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 (8821218428723) 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 3 ways as a sum of consecutive naturals, for example, 814812473 + ... + 814823298.

It is an arithmetic number, because the mean of its divisors is an integer number (2205712017402).

Almost surely, 2^{8821218428423} is an apocalyptic number.

8821218428423 is a deficient number, since it is larger than the sum of its proper divisors (1629641185).

8821218428423 is a wasteful number, since it uses less digits than its factorization.

8821218428423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629641184.

The product of its digits is 3145728, while the sum is 53.

The spelling of 8821218428423 in words is "eight trillion, eight hundred twenty-one billion, two hundred eighteen million, four hundred twenty-eight thousand, four hundred twenty-three".