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21314 has 4 divisors (see below), whose sum is σ = 31974. Its totient is φ = 10656.

The previous prime is 21313. The next prime is 21317. The reversal of 21314 is 41312.

Adding to 21314 its reverse (41312), we get a palindrome (62626).

It can be divided in two parts, 2 and 1314, that multiplied together give a triangular number (2628 = T72).

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 21025 + 289 = 145^2 + 17^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21295 and 21304.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 21314.

It is not an unprimeable number, because it can be changed into a prime (21313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5327 + ... + 5330.

221314 is an apocalyptic number.

21314 is a deficient number, since it is larger than the sum of its proper divisors (10660).

21314 is a wasteful number, since it uses less digits than its factorization.

21314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10659.

The product of its digits is 24, while the sum is 11.

The square root of 21314 is about 145.9931505243. The cubic root of 21314 is about 27.7260703265.

The spelling of 21314 in words is "twenty-one thousand, three hundred fourteen", and thus it is an iban number.

Divisors: 1 2 10657 21314