18818905900 has 72 divisors (see below), whose sum is σ = 42750326304. Its totient is φ = 7176998400.

The previous prime is 18818905879. The next prime is 18818905933. The reversal of 18818905900 is 950981881.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 706830 + ... + 732970.

It is an arithmetic number, because the mean of its divisors is an integer number (593754532).

Almost surely, 2^18818905900 is an apocalyptic number.

18818905900 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 18818905900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21375163152).

18818905900 is an abundant number, since it is smaller than the sum of its proper divisors (23931420404).

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

18818905900 is a wasteful number, since it uses less digits than its factorization.

18818905900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26491 (or 26484 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 49.

The spelling of 18818905900 in words is "eighteen billion, eight hundred eighteen million, nine hundred five thousand, nine hundred".