11826021 has 4 divisors (see below), whose sum is σ = 15768032. Its totient is φ = 7884012.

The previous prime is 11826013. The next prime is 11826029. The reversal of 11826021 is 12062811.

11826021 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.

It is an interprime number because it is at equal distance from previous prime (11826013) and next prime (11826029).

It is not a de Polignac number, because 11826021 - 2³ = 11826013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11826029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1971001 + ... + 1971006.

It is an arithmetic number, because the mean of its divisors is an integer number (3942008).

Almost surely, 2^11826021 is an apocalyptic number.

It is an amenable number.

11826021 is a deficient number, since it is larger than the sum of its proper divisors (3942011).

11826021 is an equidigital number, since it uses as much as digits as its factorization.

11826021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3942010.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 11826021 is about 3438.8982247226. The cubic root of 11826021 is about 227.8310344019.

Adding to 11826021 its reverse (12062811), we get a palindrome (23888832).

The spelling of 11826021 in words is "eleven million, eight hundred twenty-six thousand, twenty-one".