11021920 has 96 divisors (see below), whose sum is σ = 32090688. Its totient is φ = 3483648.

The previous prime is 11021917. The next prime is 11021929. The reversal of 11021920 is 2912011.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 11021894 and 11021903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14182 + ... + 14938.

It is an arithmetic number, because the mean of its divisors is an integer number (334278).

Almost surely, 2^11021920 is an apocalyptic number.

11021920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11021920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16045344).

11021920 is an abundant number, since it is smaller than the sum of its proper divisors (21068768).

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

11021920 is a wasteful number, since it uses less digits than its factorization.

11021920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792 (or 784 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 11021920 is about 3319.9277100564. The cubic root of 11021920 is about 222.5456372321.

Adding to 11021920 its reverse (2912011), we get a palindrome (13933931).

The spelling of 11021920 in words is "eleven million, twenty-one thousand, nine hundred twenty".