18824421823 has 8 divisors (see below), whose sum is σ = 19181120400. Its totient is φ = 18468978048.

The previous prime is 18824421821. The next prime is 18824421853. The reversal of 18824421823 is 32812442881.

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

It is a cyclic number.

It is not a de Polignac number, because 18824421823 - 2¹ = 18824421821 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 18824421823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18824421821) 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, 283386 + ... + 343447.

It is an arithmetic number, because the mean of its divisors is an integer number (2397640050).

Almost surely, 2^18824421823 is an apocalyptic number.

18824421823 is a deficient number, since it is larger than the sum of its proper divisors (356698577).

18824421823 is an equidigital number, since it uses as much as digits as its factorization.

18824421823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627401.

The product of its digits is 196608, while the sum is 43.

The spelling of 18824421823 in words is "eighteen billion, eight hundred twenty-four million, four hundred twenty-one thousand, eight hundred twenty-three".