11021813 has 4 divisors (see below), whose sum is σ = 12023808. Its totient is φ = 10019820.

The previous prime is 11021809. The next prime is 11021839. The reversal of 11021813 is 31812011.

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 a cyclic number.

It is not a de Polignac number, because 11021813 - 2² = 11021809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11021791 and 11021800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021863) 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, 500981 + ... + 501002.

It is an arithmetic number, because the mean of its divisors is an integer number (3005952).

Almost surely, 2^11021813 is an apocalyptic number.

It is an amenable number.

11021813 is a deficient number, since it is larger than the sum of its proper divisors (1001995).

11021813 is a wasteful number, since it uses less digits than its factorization.

11021813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001994.

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 11021813 is about 3319.9115952085. The cubic root of 11021813 is about 222.5449170775.

Adding to 11021813 its reverse (31812011), we get a palindrome (42833824).

The spelling of 11021813 in words is "eleven million, twenty-one thousand, eight hundred thirteen".