11533931982 has 80 divisors (see below), whose sum is σ = 26795463552. Its totient is φ = 3704279040.

The previous prime is 11533931963. The next prime is 11533931989. The reversal of 11533931982 is 28913933511.

11533931982 is a `hidden beast` number, since 1 + 1 + 533 + 9 + 31 + 9 + 82 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11533931989) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1165198 + ... + 1175054.

Almost surely, 2^11533931982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11533931982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13397731776).

11533931982 is an abundant number, since it is smaller than the sum of its proper divisors (15261531570).

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

11533931982 is a wasteful number, since it uses less digits than its factorization.

11533931982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10135 (or 10126 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The spelling of 11533931982 in words is "eleven billion, five hundred thirty-three million, nine hundred thirty-one thousand, nine hundred eighty-two".