21606314 has 8 divisors (see below), whose sum is σ = 32552928. Its totient is φ = 10755340.

The previous prime is 21606313. The next prime is 21606359. The reversal of 21606314 is 41360612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21606314.

It is not an unprimeable number, because it can be changed into a prime (21606313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23342 + ... + 24249.

It is an arithmetic number, because the mean of its divisors is an integer number (4069116).

Almost surely, 2^21606314 is an apocalyptic number.

21606314 is a deficient number, since it is larger than the sum of its proper divisors (10946614).

21606314 is a wasteful number, since it uses less digits than its factorization.

21606314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47820.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 21606314 is about 4648.2592440612. The cubic root of 21606314 is about 278.5224634767.

Adding to 21606314 its reverse (41360612), we get a palindrome (62966926).

The spelling of 21606314 in words is "twenty-one million, six hundred six thousand, three hundred fourteen".