21340314 has 16 divisors (see below), whose sum is σ = 47423040. Its totient is φ = 7113420.

The previous prime is 21340313. The next prime is 21340327. The reversal of 21340314 is 41304312.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21340313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197542 + ... + 197649.

It is an arithmetic number, because the mean of its divisors is an integer number (2963940).

Almost surely, 2^21340314 is an apocalyptic number.

21340314 is an abundant number, since it is smaller than the sum of its proper divisors (26082726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21340314 is a wasteful number, since it uses less digits than its factorization.

21340314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395202 (or 395196 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 21340314 is about 4619.5577710426. The cubic root of 21340314 is about 277.3747572159.

Adding to 21340314 its reverse (41304312), we get a palindrome (62644626).

The spelling of 21340314 in words is "twenty-one million, three hundred forty thousand, three hundred fourteen".