21294496 has 24 divisors (see below), whose sum is σ = 42400260. Its totient is φ = 10526208.

The previous prime is 21294491. The next prime is 21294517. The reversal of 21294496 is 69449212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20976400 + 318096 = 4580^2 + 564^2 .

It is not an unprimeable number, because it can be changed into a prime (21294491) 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, 891 + ... + 6586.

Almost surely, 2^21294496 is an apocalyptic number.

It is an amenable number.

21294496 is a deficient number, since it is larger than the sum of its proper divisors (21105764).

21294496 is an equidigital number, since it uses as much as digits as its factorization.

21294496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7576 (or 7568 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 21294496 is about 4614.5959736471. The cubic root of 21294496 is about 277.1761056123.

The spelling of 21294496 in words is "twenty-one million, two hundred ninety-four thousand, four hundred ninety-six".