21703214 has 16 divisors (see below), whose sum is σ = 36584352. Its totient is φ = 9581088.

The previous prime is 21703211. The next prime is 21703229. The reversal of 21703214 is 41230712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21703211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17549 + ... + 18744.

It is an arithmetic number, because the mean of its divisors is an integer number (2286522).

Almost surely, 2^21703214 is an apocalyptic number.

21703214 is a deficient number, since it is larger than the sum of its proper divisors (14881138).

21703214 is a wasteful number, since it uses less digits than its factorization.

21703214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36331.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 21703214 is about 4658.6708404866. The cubic root of 21703214 is about 278.9382151013.

Adding to 21703214 its reverse (41230712), we get a palindrome (62933926).

The spelling of 21703214 in words is "twenty-one million, seven hundred three thousand, two hundred fourteen".