21314005 has 8 divisors (see below), whose sum is σ = 27081432. Its totient is φ = 16048128.

The previous prime is 21313997. The next prime is 21314011. The reversal of 21314005 is 50041312.

It can be written as a sum of positive squares in 4 ways, for example, as 1830609 + 19483396 = 1353^2 + 4414^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21314005 - 2³ = 21313997 is a prime.

It is a super-3 number, since 3×21314005³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21314005.

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, 125292 + ... + 125461.

It is an arithmetic number, because the mean of its divisors is an integer number (3385179).

Almost surely, 2^21314005 is an apocalyptic number.

It is an amenable number.

21314005 is a deficient number, since it is larger than the sum of its proper divisors (5767427).

21314005 is a wasteful number, since it uses less digits than its factorization.

21314005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250775.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 21314005 is about 4616.7093259160. The cubic root of 21314005 is about 277.2607249453.

Adding to 21314005 its reverse (50041312), we get a palindrome (71355317).

The spelling of 21314005 in words is "twenty-one million, three hundred fourteen thousand, five".