21386714 has 32 divisors (see below), whose sum is σ = 35582976. Its totient is φ = 9596160.

The previous prime is 21386713. The next prime is 21386747. The reversal of 21386714 is 41768312.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21386713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108464 + ... + 108660.

It is an arithmetic number, because the mean of its divisors is an integer number (1111968).

Almost surely, 2^21386714 is an apocalyptic number.

21386714 is a deficient number, since it is larger than the sum of its proper divisors (14196262).

21386714 is a wasteful number, since it uses less digits than its factorization.

21386714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350.

The product of its digits is 8064, while the sum is 32.

The square root of 21386714 is about 4624.5771698610. The cubic root of 21386714 is about 277.5756426098.

The spelling of 21386714 in words is "twenty-one million, three hundred eighty-six thousand, seven hundred fourteen".