21714206 has 16 divisors (see below), whose sum is σ = 33467904. Its totient is φ = 10561824.

The previous prime is 21714197. The next prime is 21714223. The reversal of 21714206 is 60241712.

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 in 7 ways as a sum of consecutive naturals, for example, 12656 + ... + 14268.

It is an arithmetic number, because the mean of its divisors is an integer number (2091744).

Almost surely, 2^21714206 is an apocalyptic number.

21714206 is a deficient number, since it is larger than the sum of its proper divisors (11753698).

21714206 is a wasteful number, since it uses less digits than its factorization.

21714206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 21714206 is about 4659.8504267841. The cubic root of 21714206 is about 278.9852983179.

Adding to 21714206 its reverse (60241712), we get a palindrome (81955918).

The spelling of 21714206 in words is "twenty-one million, seven hundred fourteen thousand, two hundred six".