21314017 has 4 divisors (see below), whose sum is σ = 21431956. Its totient is φ = 21196080.

The previous prime is 21314011. The next prime is 21314053. The reversal of 21314017 is 71041312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 163216 + 21150801 = 404^2 + 4599^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21314017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21313985 and 21314003.

It is not an unprimeable number, because it can be changed into a prime (21314011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58698 + ... + 59059.

It is an arithmetic number, because the mean of its divisors is an integer number (5357989).

Almost surely, 2^21314017 is an apocalyptic number.

It is an amenable number.

21314017 is a deficient number, since it is larger than the sum of its proper divisors (117939).

21314017 is a wasteful number, since it uses less digits than its factorization.

21314017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117938.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 21314017 is about 4616.7106255428. The cubic root of 21314017 is about 277.2607769788.

Adding to 21314017 its reverse (71041312), we get a palindrome (92355329).

The spelling of 21314017 in words is "twenty-one million, three hundred fourteen thousand, seventeen".