11821670 has 32 divisors (see below), whose sum is σ = 24446016. Its totient is φ = 4032000.

The previous prime is 11821661. The next prime is 11821673. The reversal of 11821670 is 7612811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11821673) 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 15 ways as a sum of consecutive naturals, for example, 19370 + ... + 19970.

It is an arithmetic number, because the mean of its divisors is an integer number (763938).

Almost surely, 2^11821670 is an apocalyptic number.

11821670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11821670 is an abundant number, since it is smaller than the sum of its proper divisors (12624346).

11821670 is a wasteful number, since it uses less digits than its factorization.

11821670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 11821670 is about 3438.2655511173. The cubic root of 11821670 is about 227.8030899669.

The spelling of 11821670 in words is "eleven million, eight hundred twenty-one thousand, six hundred seventy".