21314717 has 4 divisors (see below), whose sum is σ = 21521760. Its totient is φ = 21107676.

The previous prime is 21314687. The next prime is 21314729. The reversal of 21314717 is 71741312.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21314717 - 2⁶ = 21314653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21314417) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 103367 + ... + 103572.

It is an arithmetic number, because the mean of its divisors is an integer number (5380440).

Almost surely, 2^21314717 is an apocalyptic number.

It is an amenable number.

21314717 is a deficient number, since it is larger than the sum of its proper divisors (207043).

21314717 is a wasteful number, since it uses less digits than its factorization.

21314717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207042.

The product of its digits is 1176, while the sum is 26.

The square root of 21314717 is about 4616.7864364729. The cubic root of 21314717 is about 277.2638122336.

The spelling of 21314717 in words is "twenty-one million, three hundred fourteen thousand, seven hundred seventeen".