11809020 has 24 divisors (see below), whose sum is σ = 33065424. Its totient is φ = 3149056.

The previous prime is 11809019. The next prime is 11809043. The reversal of 11809020 is 2090811.

11809020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 98349 + ... + 98468.

It is an arithmetic number, because the mean of its divisors is an integer number (1377726).

Almost surely, 2^11809020 is an apocalyptic number.

11809020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11809020 is an abundant number, since it is smaller than the sum of its proper divisors (21256404).

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

11809020 is a wasteful number, since it uses less digits than its factorization.

11809020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196829 (or 196827 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 11809020 is about 3436.4254684192. The cubic root of 11809020 is about 227.7218059753.

Adding to 11809020 its reverse (2090811), we get a palindrome (13899831).

The spelling of 11809020 in words is "eleven million, eight hundred nine thousand, twenty".