21340214 has 16 divisors (see below), whose sum is σ = 37764096. Its totient is φ = 8850600.

The previous prime is 21340177. The next prime is 21340217. The reversal of 21340214 is 41204312.

It is a junction number, because it is equal to n+sod(n) for n = 21340192 and 21340201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21340217) 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, 24152 + ... + 25019.

It is an arithmetic number, because the mean of its divisors is an integer number (2360256).

Almost surely, 2^21340214 is an apocalyptic number.

21340214 is a deficient number, since it is larger than the sum of its proper divisors (16423882).

21340214 is a wasteful number, since it uses less digits than its factorization.

21340214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49211.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 21340214 is about 4619.5469474831. The cubic root of 21340214 is about 277.3743239589.

Adding to 21340214 its reverse (41204312), we get a palindrome (62544526).

The spelling of 21340214 in words is "twenty-one million, three hundred forty thousand, two hundred fourteen".