11320381 has 4 divisors (see below), whose sum is σ = 11329600. Its totient is φ = 11311164.

The previous prime is 11320369. The next prime is 11320403. The reversal of 11320381 is 18302311.

11320381 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18302311 = 101 ⋅181211.

It is a cyclic number.

It is not a de Polignac number, because 11320381 - 2⁵ = 11320349 is a prime.

It is a super-2 number, since 2×11320381² = 256302051970322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11320081) 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, 2421 + ... + 5338.

It is an arithmetic number, because the mean of its divisors is an integer number (2832400).

Almost surely, 2^11320381 is an apocalyptic number.

It is an amenable number.

11320381 is a deficient number, since it is larger than the sum of its proper divisors (9219).

11320381 is an equidigital number, since it uses as much as digits as its factorization.

11320381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9218.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 11320381 is about 3364.5773880236. The cubic root of 11320381 is about 224.5365340516.

Adding to 11320381 its reverse (18302311), we get a palindrome (29622692).

The spelling of 11320381 in words is "eleven million, three hundred twenty thousand, three hundred eighty-one".