21794456 has 16 divisors (see below), whose sum is σ = 40950600. Its totient is φ = 10874304.

The previous prime is 21794453. The next prime is 21794467. The reversal of 21794456 is 65449712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21794453) 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 3 ways as a sum of consecutive naturals, for example, 1580 + ... + 6788.

Almost surely, 2^21794456 is an apocalyptic number.

It is an amenable number.

21794456 is a deficient number, since it is larger than the sum of its proper divisors (19156144).

21794456 is a wasteful number, since it uses less digits than its factorization.

21794456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5738 (or 5734 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 21794456 is about 4668.4532770501. The cubic root of 21794456 is about 279.3285612479.

The spelling of 21794456 in words is "twenty-one million, seven hundred ninety-four thousand, four hundred fifty-six".