11910820 has 24 divisors (see below), whose sum is σ = 25820928. Its totient is φ = 4610400.

The previous prime is 11910809. The next prime is 11910823. The reversal of 11910820 is 2801911.

It is a junction number, because it is equal to n+sod(n) for n = 11910791 and 11910800.

It is not an unprimeable number, because it can be changed into a prime (11910823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8986 + ... + 10225.

It is an arithmetic number, because the mean of its divisors is an integer number (1075872).

Almost surely, 2^11910820 is an apocalyptic number.

11910820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11910820 is an abundant number, since it is smaller than the sum of its proper divisors (13910108).

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

11910820 is a wasteful number, since it uses less digits than its factorization.

11910820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19251 (or 19249 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 11910820 is about 3451.2055864582. The cubic root of 11910820 is about 228.3742954317.

The spelling of 11910820 in words is "eleven million, nine hundred ten thousand, eight hundred twenty".