11009009020 has 24 divisors (see below), whose sum is σ = 23157540000. Its totient is φ = 4396247232.

The previous prime is 11009009017. The next prime is 11009009021. The reversal of 11009009020 is 2090090011.

It is a junction number, because it is equal to n+sod(n) for n = 11009008982 and 11009009000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11009009021) 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 7 ways as a sum of consecutive naturals, for example, 447495 + ... + 471454.

It is an arithmetic number, because the mean of its divisors is an integer number (964897500).

Almost surely, 2^11009009020 is an apocalyptic number.

11009009020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11009009020 is an abundant number, since it is smaller than the sum of its proper divisors (12148530980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11009009020 is a wasteful number, since it uses less digits than its factorization.

11009009020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919557 (or 919555 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 22.

Adding to 11009009020 its reverse (2090090011), we get a palindrome (13099099031).

The spelling of 11009009020 in words is "eleven billion, nine million, nine thousand, twenty".