21794468 has 6 divisors (see below), whose sum is σ = 38140326. Its totient is φ = 10897232.

The previous prime is 21794467. The next prime is 21794471. The reversal of 21794468 is 86449712.

It can be written as a sum of positive squares in only one way, i.e., 21141604 + 652864 = 4598^2 + 808^2 .

It is not an unprimeable number, because it can be changed into a prime (21794467) 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 as a sum of consecutive naturals, namely, 2724305 + ... + 2724312.

It is an arithmetic number, because the mean of its divisors is an integer number (6356721).

Almost surely, 2^21794468 is an apocalyptic number.

It is an amenable number.

21794468 is a deficient number, since it is larger than the sum of its proper divisors (16345858).

21794468 is a wasteful number, since it uses less digits than its factorization.

21794468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5448621 (or 5448619 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 21794468 is about 4668.4545622722. The cubic root of 21794468 is about 279.3286125139.

The spelling of 21794468 in words is "twenty-one million, seven hundred ninety-four thousand, four hundred sixty-eight".