21030214 has 16 divisors (see below), whose sum is σ = 32679936. Its totient is φ = 10139400.

The previous prime is 21030203. The next prime is 21030227. The reversal of 21030214 is 41203012.

It is a junction number, because it is equal to n+sod(n) for n = 21030194 and 21030203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26329 + ... + 27115.

It is an arithmetic number, because the mean of its divisors is an integer number (2042496).

Almost surely, 2^21030214 is an apocalyptic number.

21030214 is a deficient number, since it is larger than the sum of its proper divisors (11649722).

21030214 is a wasteful number, since it uses less digits than its factorization.

21030214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 21030214 is about 4585.8711277139. The cubic root of 21030214 is about 276.0246687325.

Adding to 21030214 its reverse (41203012), we get a palindrome (62233226).

The spelling of 21030214 in words is "twenty-one million, thirty thousand, two hundred fourteen".