21448814 has 8 divisors (see below), whose sum is σ = 32263920. Its totient is φ = 10694176.

The previous prime is 21448799. The next prime is 21448829. The reversal of 21448814 is 41884412.

It is an interprime number because it is at equal distance from previous prime (21448799) and next prime (21448829).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14219 + ... + 15654.

It is an arithmetic number, because the mean of its divisors is an integer number (4032990).

Almost surely, 2^21448814 is an apocalyptic number.

21448814 is a deficient number, since it is larger than the sum of its proper divisors (10815106).

21448814 is a wasteful number, since it uses less digits than its factorization.

21448814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30234.

The product of its digits is 8192, while the sum is 32.

The square root of 21448814 is about 4631.2864303560. The cubic root of 21448814 is about 277.8440458547.

The spelling of 21448814 in words is "twenty-one million, four hundred forty-eight thousand, eight hundred fourteen".