11311320 has 32 divisors (see below), whose sum is σ = 33934320. Its totient is φ = 3016320.

The previous prime is 11311319. The next prime is 11311337. The reversal of 11311320 is 2311311.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 11311296 and 11311305.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 47011 + ... + 47250.

Almost surely, 2^11311320 is an apocalyptic number.

11311320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11311320 is an abundant number, since it is smaller than the sum of its proper divisors (22623000).

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

11311320 is a wasteful number, since it uses less digits than its factorization.

11311320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94275 (or 94271 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 11311320 is about 3363.2305897753. The cubic root of 11311320 is about 224.4766106092.

Adding to 11311320 its reverse (2311311), we get a palindrome (13622631).

Subtracting from 11311320 its reverse (2311311), we obtain a palindrome (9000009).

The spelling of 11311320 in words is "eleven million, three hundred eleven thousand, three hundred twenty".