21446214 has 16 divisors (see below), whose sum is σ = 45415728. Its totient is φ = 6728192.

The previous prime is 21446213. The next prime is 21446221. The reversal of 21446214 is 41264412.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21446213) 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 7 ways as a sum of consecutive naturals, for example, 105027 + ... + 105230.

It is an arithmetic number, because the mean of its divisors is an integer number (2838483).

Almost surely, 2^21446214 is an apocalyptic number.

21446214 is an abundant number, since it is smaller than the sum of its proper divisors (23969514).

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

21446214 is a wasteful number, since it uses less digits than its factorization.

21446214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210279.

The product of its digits is 1536, while the sum is 24.

The square root of 21446214 is about 4631.0057223027. The cubic root of 21446214 is about 277.8328187582.

The spelling of 21446214 in words is "twenty-one million, four hundred forty-six thousand, two hundred fourteen".