11821930 has 16 divisors (see below), whose sum is σ = 21409920. Its totient is φ = 4699792.

The previous prime is 11821913. The next prime is 11821961. The reversal of 11821930 is 3912811.

11821930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 11821895 and 11821904.

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, 1870 + ... + 5209.

It is an arithmetic number, because the mean of its divisors is an integer number (1338120).

Almost surely, 2^11821930 is an apocalyptic number.

11821930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11821930 is a deficient number, since it is larger than the sum of its proper divisors (9587990).

11821930 is a wasteful number, since it uses less digits than its factorization.

11821930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7253.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 11821930 is about 3438.3033606708. The cubic root of 11821930 is about 227.8047600177.

The spelling of 11821930 in words is "eleven million, eight hundred twenty-one thousand, nine hundred thirty".