11213587188 has 120 divisors (see below), whose sum is σ = 30186348192. Its totient is φ = 3627239616.

The previous prime is 11213587169. The next prime is 11213587199. The reversal of 11213587188 is 88178531211.

11213587188 is a `hidden beast` number, since 112 + 1 + 358 + 7 + 188 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5597395 + ... + 5599397.

Almost surely, 2^11213587188 is an apocalyptic number.

11213587188 is a gapful number since it is divisible by the number (18) 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 11213587188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15093174096).

11213587188 is an abundant number, since it is smaller than the sum of its proper divisors (18972761004).

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

11213587188 is a wasteful number, since it uses less digits than its factorization.

11213587188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523 (or 2512 counting only the distinct ones).

The product of its digits is 107520, while the sum is 45.

The spelling of 11213587188 in words is "eleven billion, two hundred thirteen million, five hundred eighty-seven thousand, one hundred eighty-eight".