11091020 has 24 divisors (see below), whose sum is σ = 23675568. Its totient is φ = 4363200.

The previous prime is 11091011. The next prime is 11091029. The reversal of 11091020 is 2019011.

It is an interprime number because it is at equal distance from previous prime (11091011) and next prime (11091029).

It is a junction number, because it is equal to n+sod(n) for n = 11090986 and 11091004.

It is not an unprimeable number, because it can be changed into a prime (11091029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3326 + ... + 5765.

It is an arithmetic number, because the mean of its divisors is an integer number (986482).

Almost surely, 2^11091020 is an apocalyptic number.

11091020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11091020 is an abundant number, since it is smaller than the sum of its proper divisors (12584548).

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

11091020 is a wasteful number, since it uses less digits than its factorization.

11091020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9161 (or 9159 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 11091020 is about 3330.3183031056. The cubic root of 11091020 is about 223.0097390292.

The spelling of 11091020 in words is "eleven million, ninety-one thousand, twenty".