21306314 has 4 divisors (see below), whose sum is σ = 31959474. Its totient is φ = 10653156.

The previous prime is 21306301. The next prime is 21306317. The reversal of 21306314 is 41360312.

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., 21022225 + 284089 = 4585^2 + 533^2 .

It is not an unprimeable number, because it can be changed into a prime (21306317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5326577 + ... + 5326580.

Almost surely, 2^21306314 is an apocalyptic number.

21306314 is a deficient number, since it is larger than the sum of its proper divisors (10653160).

21306314 is a wasteful number, since it uses less digits than its factorization.

21306314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10653159.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 21306314 is about 4615.8762981692. The cubic root of 21306314 is about 277.2273717772.

Adding to 21306314 its reverse (41360312), we get a palindrome (62666626).

The spelling of 21306314 in words is "twenty-one million, three hundred six thousand, three hundred fourteen".