11820920 has 32 divisors (see below), whose sum is σ = 27457920. Its totient is φ = 4575360.

The previous prime is 11820901. The next prime is 11820947. The reversal of 11820920 is 2902811.

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, 3527 + ... + 6006.

It is an arithmetic number, because the mean of its divisors is an integer number (858060).

Almost surely, 2^11820920 is an apocalyptic number.

11820920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11820920 is an abundant number, since it is smaller than the sum of its proper divisors (15637000).

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

11820920 is a wasteful number, since it uses less digits than its factorization.

11820920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9575 (or 9571 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 11820920 is about 3438.1564827681. The cubic root of 11820920 is about 227.7982723754.

The spelling of 11820920 in words is "eleven million, eight hundred twenty thousand, nine hundred twenty".