21424314 has 8 divisors (see below), whose sum is σ = 42848640. Its totient is φ = 7141436.

The previous prime is 21424313. The next prime is 21424327. The reversal of 21424314 is 41342412.

It is a sphenic number, since it is the product of 3 distinct primes.

21424314 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21424313) 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, 1785354 + ... + 1785365.

It is an arithmetic number, because the mean of its divisors is an integer number (5356080).

Almost surely, 2^21424314 is an apocalyptic number.

21424314 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21424314 is a wasteful number, since it uses less digits than its factorization.

21424314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3570724.

The product of its digits is 768, while the sum is 21.

The square root of 21424314 is about 4628.6406211759. The cubic root of 21424314 is about 277.7382160310.

Adding to 21424314 its reverse (41342412), we get a palindrome (62766726).

The spelling of 21424314 in words is "twenty-one million, four hundred twenty-four thousand, three hundred fourteen".