21330214 has 4 divisors (see below), whose sum is σ = 31995324. Its totient is φ = 10665106.

The previous prime is 21330163. The next prime is 21330251. The reversal of 21330214 is 41203312.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 5332552 + ... + 5332555.

It is an arithmetic number, because the mean of its divisors is an integer number (7998831).

Almost surely, 2^21330214 is an apocalyptic number.

21330214 is a deficient number, since it is larger than the sum of its proper divisors (10665110).

21330214 is a wasteful number, since it uses less digits than its factorization.

21330214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10665109.

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

The square root of 21330214 is about 4618.4644634337. The cubic root of 21330214 is about 277.3309914255.

Adding to 21330214 its reverse (41203312), we get a palindrome (62533526).

The spelling of 21330214 in words is "twenty-one million, three hundred thirty thousand, two hundred fourteen".