21314365 has 4 divisors (see below), whose sum is σ = 25577244. Its totient is φ = 17051488.

The previous prime is 21314357. The next prime is 21314387. The reversal of 21314365 is 56341312.

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 6859161 + 14455204 = 2619^2 + 3802^2 .

It is a cyclic number.

It is not a de Polignac number, because 21314365 - 2³ = 21314357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2131432 + ... + 2131441.

It is an arithmetic number, because the mean of its divisors is an integer number (6394311).

Almost surely, 2^21314365 is an apocalyptic number.

It is an amenable number.

21314365 is a deficient number, since it is larger than the sum of its proper divisors (4262879).

21314365 is an equidigital number, since it uses as much as digits as its factorization.

21314365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4262878.

The product of its digits is 2160, while the sum is 25.

The square root of 21314365 is about 4616.7483145608. The cubic root of 21314365 is about 277.2622859424.

Adding to 21314365 its reverse (56341312), we get a palindrome (77655677).

The spelling of 21314365 in words is "twenty-one million, three hundred fourteen thousand, three hundred sixty-five".