11191894500 has 96 divisors (see below), whose sum is σ = 32735364480. Its totient is φ = 2971267200.

The previous prime is 11191894487. The next prime is 11191894523. The reversal of 11191894500 is 549819111.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 324066 + ... + 356934.

It is an arithmetic number, because the mean of its divisors is an integer number (340993380).

Almost surely, 2^11191894500 is an apocalyptic number.

11191894500 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 11191894500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16367682240).

11191894500 is an abundant number, since it is smaller than the sum of its proper divisors (21543469980).

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

11191894500 is a wasteful number, since it uses less digits than its factorization.

11191894500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33118 (or 33106 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 39.

The spelling of 11191894500 in words is "eleven billion, one hundred ninety-one million, eight hundred ninety-four thousand, five hundred".