11020809 has 8 divisors (see below), whose sum is σ = 14935552. Its totient is φ = 7226640.

The previous prime is 11020769. The next prime is 11020813. The reversal of 11020809 is 90802011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11020809 - 2⁹ = 11020297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11020829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29929 + ... + 30294.

It is an arithmetic number, because the mean of its divisors is an integer number (1866944).

Almost surely, 2^11020809 is an apocalyptic number.

It is an amenable number.

11020809 is a deficient number, since it is larger than the sum of its proper divisors (3914743).

11020809 is an equidigital number, since it uses as much as digits as its factorization.

11020809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60287.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 11020809 is about 3319.7603829192. The cubic root of 11020809 is about 222.5381595116.

The spelling of 11020809 in words is "eleven million, twenty thousand, eight hundred nine".