11131818500 has 192 divisors, whose sum is σ = 27433486080. Its totient is φ = 3943632000.

The previous prime is 11131818497. The next prime is 11131818547. The reversal of 11131818500 is 581813111.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28616306 + ... + 28616694.

It is an arithmetic number, because the mean of its divisors is an integer number (142882740).

Almost surely, 2^11131818500 is an apocalyptic number.

11131818500 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 11131818500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13716743040).

11131818500 is an abundant number, since it is smaller than the sum of its proper divisors (16301667580).

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

11131818500 is a wasteful number, since it uses less digits than its factorization.

11131818500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 29.

The spelling of 11131818500 in words is "eleven billion, one hundred thirty-one million, eight hundred eighteen thousand, five hundred".