21368714 has 4 divisors (see below), whose sum is σ = 32053074. Its totient is φ = 10684356.

The previous prime is 21368713. The next prime is 21368723. The reversal of 21368714 is 41786312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20857489 + 511225 = 4567^2 + 715^2 .

It is not an unprimeable number, because it can be changed into a prime (21368713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5342177 + ... + 5342180.

Almost surely, 2^21368714 is an apocalyptic number.

21368714 is a deficient number, since it is larger than the sum of its proper divisors (10684360).

21368714 is a wasteful number, since it uses less digits than its factorization.

21368714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10684359.

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

The square root of 21368714 is about 4622.6306363368. The cubic root of 21368714 is about 277.4977474589.

The spelling of 21368714 in words is "twenty-one million, three hundred sixty-eight thousand, seven hundred fourteen".