11820031 has 4 divisors (see below), whose sum is σ = 12013864. Its totient is φ = 11626200.

The previous prime is 11820019. The next prime is 11820037. The reversal of 11820031 is 13002811.

11820031 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 an emirpimes, since its reverse is a distinct semiprime: 13002811 = 89 ⋅146099.

It is a cyclic number.

It is not a de Polignac number, because 11820031 - 2⁷ = 11819903 is a prime.

It is a super-2 number, since 2×11820031² = 279426265681922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11819987 and 11820014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11820037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96825 + ... + 96946.

It is an arithmetic number, because the mean of its divisors is an integer number (3003466).

Almost surely, 2^11820031 is an apocalyptic number.

11820031 is a deficient number, since it is larger than the sum of its proper divisors (193833).

11820031 is an equidigital number, since it uses as much as digits as its factorization.

11820031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193832.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 11820031 is about 3438.0271959366. The cubic root of 11820031 is about 227.7925616597.

Adding to 11820031 its reverse (13002811), we get a palindrome (24822842).

The spelling of 11820031 in words is "eleven million, eight hundred twenty thousand, thirty-one".