21449214 has 48 divisors (see below), whose sum is σ = 49795200. Its totient is φ = 6652368.

The previous prime is 21449213. The next prime is 21449221. The reversal of 21449214 is 41294412.

It is a happy number.

21449214 is a `hidden beast` number, since 2 + 1 + 449 + 214 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21449213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19647 + ... + 20709.

It is an arithmetic number, because the mean of its divisors is an integer number (1037400).

Almost surely, 2^21449214 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21449214, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24897600).

21449214 is an abundant number, since it is smaller than the sum of its proper divisors (28345986).

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

21449214 is a wasteful number, since it uses less digits than its factorization.

21449214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149 (or 1146 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 21449214 is about 4631.3296147003. The cubic root of 21449214 is about 277.8457730198.

The spelling of 21449214 in words is "twenty-one million, four hundred forty-nine thousand, two hundred fourteen".