21094324 has 6 divisors (see below), whose sum is σ = 36915074. Its totient is φ = 10547160.

The previous prime is 21094279. The next prime is 21094357. The reversal of 21094324 is 42349012.

It can be written as a sum of positive squares in only one way, i.e., 19184400 + 1909924 = 4380^2 + 1382^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2636787 + ... + 2636794.

Almost surely, 2^21094324 is an apocalyptic number.

It is an amenable number.

21094324 is a deficient number, since it is larger than the sum of its proper divisors (15820750).

21094324 is a wasteful number, since it uses less digits than its factorization.

21094324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5273585 (or 5273583 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 21094324 is about 4592.8557564983. The cubic root of 21094324 is about 276.3048686083.

The spelling of 21094324 in words is "twenty-one million, ninety-four thousand, three hundred twenty-four".