21033214 has 4 divisors (see below), whose sum is σ = 31549824. Its totient is φ = 10516606.

The previous prime is 21033203. The next prime is 21033223. The reversal of 21033214 is 41233012.

It is a happy number.

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, 5258302 + ... + 5258305.

It is an arithmetic number, because the mean of its divisors is an integer number (7887456).

Almost surely, 2^21033214 is an apocalyptic number.

21033214 is a deficient number, since it is larger than the sum of its proper divisors (10516610).

21033214 is a wasteful number, since it uses less digits than its factorization.

21033214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10516609.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 21033214 is about 4586.1982076661. The cubic root of 21033214 is about 276.0377932564.

Adding to 21033214 its reverse (41233012), we get a palindrome (62266226).

The spelling of 21033214 in words is "twenty-one million, thirty-three thousand, two hundred fourteen".