21094196 has 12 divisors (see below), whose sum is σ = 36981252. Its totient is φ = 10528128.

The previous prime is 21094163. The next prime is 21094207. The reversal of 21094196 is 69149012.

It can be written as a sum of positive squares in 2 ways, for example, as 7507600 + 13586596 = 2740^2 + 3686^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2075 + ... + 6818.

It is an arithmetic number, because the mean of its divisors is an integer number (3081771).

Almost surely, 2^21094196 is an apocalyptic number.

It is an amenable number.

21094196 is a deficient number, since it is larger than the sum of its proper divisors (15887056).

21094196 is a wasteful number, since it uses less digits than its factorization.

21094196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9490 (or 9488 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 21094196 is about 4592.8418217918. The cubic root of 21094196 is about 276.3043097361.

The spelling of 21094196 in words is "twenty-one million, ninety-four thousand, one hundred ninety-six".