18873323520 has 208 divisors, whose sum is σ = 61131333312. Its totient is φ = 4970905600.

The previous prime is 18873323473. The next prime is 18873323527. The reversal of 18873323520 is 2532337881.

It is not an unprimeable number, because it can be changed into a prime (18873323527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5097670 + ... + 5101370.

Almost surely, 2^18873323520 is an apocalyptic number.

18873323520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18873323520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30565666656).

18873323520 is an abundant number, since it is smaller than the sum of its proper divisors (42258009792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18873323520 is an equidigital number, since it uses as much as digits as its factorization.

18873323520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3816 (or 3794 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 18873323520 in words is "eighteen billion, eight hundred seventy-three million, three hundred twenty-three thousand, five hundred twenty".