21814414 has 4 divisors (see below), whose sum is σ = 32721624. Its totient is φ = 10907206.

The previous prime is 21814399. The next prime is 21814433. The reversal of 21814414 is 41441812.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5453602 + ... + 5453605.

It is an arithmetic number, because the mean of its divisors is an integer number (8180406).

Almost surely, 2^21814414 is an apocalyptic number.

21814414 is a deficient number, since it is larger than the sum of its proper divisors (10907210).

21814414 is a wasteful number, since it uses less digits than its factorization.

21814414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10907209.

The product of its digits is 1024, while the sum is 25.

The square root of 21814414 is about 4670.5903267146. The cubic root of 21814414 is about 279.4137991114.

The spelling of 21814414 in words is "twenty-one million, eight hundred fourteen thousand, four hundred fourteen".