11020020989 has 4 divisors (see below), whose sum is σ = 11021331900. Its totient is φ = 11018710080.

The previous prime is 11020020953. The next prime is 11020021031. The reversal of 11020020989 is 98902002011.

It is a happy number.

11020020989 is digitally balanced in base 2, 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: 98902002011 = 3851 ⋅25682161.

It can be written as a sum of positive squares in 2 ways, for example, as 9825765625 + 1194255364 = 99125^2 + 34558^2 .

It is a cyclic number.

It is not a de Polignac number, because 11020020989 - 2⁸ = 11020020733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020026989) 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, 642764 + ... + 659685.

It is an arithmetic number, because the mean of its divisors is an integer number (2755332975).

Almost surely, 2^11020020989 is an apocalyptic number.

It is an amenable number.

11020020989 is a deficient number, since it is larger than the sum of its proper divisors (1310911).

11020020989 is an equidigital number, since it uses as much as digits as its factorization.

11020020989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310910.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 11020020989 in words is "eleven billion, twenty million, twenty thousand, nine hundred eighty-nine".