21794716 has 6 divisors (see below), whose sum is σ = 38140760. Its totient is φ = 10897356.

The previous prime is 21794693. The next prime is 21794719. The reversal of 21794716 is 61749712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21794719) by changing a digit.

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 as a sum of consecutive naturals, namely, 2724336 + ... + 2724343.

Almost surely, 2^21794716 is an apocalyptic number.

It is an amenable number.

21794716 is a deficient number, since it is larger than the sum of its proper divisors (16346044).

21794716 is a wasteful number, since it uses less digits than its factorization.

21794716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5448683 (or 5448681 counting only the distinct ones).

The product of its digits is 21168, while the sum is 37.

The square root of 21794716 is about 4668.4811234490. The cubic root of 21794716 is about 279.3296720065.

The spelling of 21794716 in words is "twenty-one million, seven hundred ninety-four thousand, seven hundred sixteen".