11841820 has 24 divisors (see below), whose sum is σ = 24935904. Its totient is φ = 4723776.

The previous prime is 11841811. The next prime is 11841829. The reversal of 11841820 is 2814811.

It is an interprime number because it is at equal distance from previous prime (11841811) and next prime (11841829).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11841829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10609 + ... + 11671.

It is an arithmetic number, because the mean of its divisors is an integer number (1038996).

Almost surely, 2^11841820 is an apocalyptic number.

11841820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11841820 is an abundant number, since it is smaller than the sum of its proper divisors (13094084).

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

11841820 is a wasteful number, since it uses less digits than its factorization.

11841820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629 (or 1627 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 11841820 is about 3441.1945600329. The cubic root of 11841820 is about 227.9324463866.

The spelling of 11841820 in words is "eleven million, eight hundred forty-one thousand, eight hundred twenty".