18821308600 has 96 divisors (see below), whose sum is σ = 46377969120. Its totient is φ = 7078891520.

The previous prime is 18821308579. The next prime is 18821308603. The reversal of 18821308600 is 680312881.

It is a self number, because there is not a number n which added to its sum of digits gives 18821308600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18821308603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4870269 + ... + 4874131.

It is an arithmetic number, because the mean of its divisors is an integer number (483103845).

Almost surely, 2^18821308600 is an apocalyptic number.

18821308600 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 18821308600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23188984560).

18821308600 is an abundant number, since it is smaller than the sum of its proper divisors (27556660520).

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

18821308600 is a wasteful number, since it uses less digits than its factorization.

18821308600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5329 (or 5320 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The spelling of 18821308600 in words is "eighteen billion, eight hundred twenty-one million, three hundred eight thousand, six hundred".