11220920 has 32 divisors (see below), whose sum is σ = 25416720. Its totient is φ = 4458240.

The previous prime is 11220917. The next prime is 11220931. The reversal of 11220920 is 2902211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5660 + ... + 7380.

Almost surely, 2^11220920 is an apocalyptic number.

11220920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11220920 is an abundant number, since it is smaller than the sum of its proper divisors (14195800).

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

11220920 is a wasteful number, since it uses less digits than its factorization.

11220920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895 (or 1891 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 11220920 is about 3349.7641708037. The cubic root of 11220920 is about 223.8770051820.

The spelling of 11220920 in words is "eleven million, two hundred twenty thousand, nine hundred twenty".