21468396 has 12 divisors (see below), whose sum is σ = 50092952. Its totient is φ = 7156128.

The previous prime is 21468383. The next prime is 21468397. The reversal of 21468396 is 69386412.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21468397) 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 in 3 ways as a sum of consecutive naturals, for example, 894505 + ... + 894528.

Almost surely, 2^21468396 is an apocalyptic number.

It is an amenable number.

21468396 is an abundant number, since it is smaller than the sum of its proper divisors (28624556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21468396 is a wasteful number, since it uses less digits than its factorization.

21468396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789040 (or 1789038 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 21468396 is about 4633.4000474813. The cubic root of 21468396 is about 277.9285740281.

The spelling of 21468396 in words is "twenty-one million, four hundred sixty-eight thousand, three hundred ninety-six".