21356714 has 8 divisors (see below), whose sum is σ = 32057760. Its totient is φ = 10670796.

The previous prime is 21356711. The next prime is 21356723. The reversal of 21356714 is 41765312.

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

It is a super-2 number, since 2×21356714² = 912218465755592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21356711) 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 in 3 ways as a sum of consecutive naturals, for example, 917 + ... + 6599.

It is an arithmetic number, because the mean of its divisors is an integer number (4007220).

Almost surely, 2^21356714 is an apocalyptic number.

21356714 is a deficient number, since it is larger than the sum of its proper divisors (10701046).

21356714 is a wasteful number, since it uses less digits than its factorization.

21356714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7564.

The product of its digits is 5040, while the sum is 29.

The square root of 21356714 is about 4621.3324918253. The cubic root of 21356714 is about 277.4457930534.

The spelling of 21356714 in words is "twenty-one million, three hundred fifty-six thousand, seven hundred fourteen".