21014204 has 12 divisors (see below), whose sum is σ = 36829800. Its totient is φ = 10491408.

The previous prime is 21014179. The next prime is 21014233. The reversal of 21014204 is 40241012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599 + ... + 6510.

It is an arithmetic number, because the mean of its divisors is an integer number (3069150).

Almost surely, 2^21014204 is an apocalyptic number.

It is an amenable number.

21014204 is a deficient number, since it is larger than the sum of its proper divisors (15815596).

21014204 is a wasteful number, since it uses less digits than its factorization.

21014204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7852 (or 7850 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 21014204 is about 4584.1252164399. The cubic root of 21014204 is about 275.9546064112.

Adding to 21014204 its reverse (40241012), we get a palindrome (61255216).

The spelling of 21014204 in words is "twenty-one million, fourteen thousand, two hundred four".