11181020 has 12 divisors (see below), whose sum is σ = 23480184. Its totient is φ = 4472400.

The previous prime is 11181017. The next prime is 11181029. The reversal of 11181020 is 2018111.

It is a junction number, because it is equal to n+sod(n) for n = 11180986 and 11181004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11181029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279506 + ... + 279545.

It is an arithmetic number, because the mean of its divisors is an integer number (1956682).

Almost surely, 2^11181020 is an apocalyptic number.

11181020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11181020 is an abundant number, since it is smaller than the sum of its proper divisors (12299164).

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

11181020 is a wasteful number, since it uses less digits than its factorization.

11181020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559060 (or 559058 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 11181020 is about 3343.8032238755. The cubic root of 11181020 is about 223.6113317414.

Adding to 11181020 its reverse (2018111), we get a palindrome (13199131).

The spelling of 11181020 in words is "eleven million, one hundred eighty-one thousand, twenty".