21314866 has 8 divisors (see below), whose sum is σ = 32055660. Its totient is φ = 10629648.

The previous prime is 21314861. The next prime is 21314893. The reversal of 21314866 is 66841312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21298225 + 16641 = 4615^2 + 129^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21314861) 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, 12921 + ... + 14476.

Almost surely, 2^21314866 is an apocalyptic number.

21314866 is a deficient number, since it is larger than the sum of its proper divisors (10740794).

21314866 is a wasteful number, since it uses less digits than its factorization.

21314866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27788.

The product of its digits is 6912, while the sum is 31.

The square root of 21314866 is about 4616.8025732102. The cubic root of 21314866 is about 277.2644583007.

The spelling of 21314866 in words is "twenty-one million, three hundred fourteen thousand, eight hundred sixty-six".