21235714 has 8 divisors (see below), whose sum is σ = 32952060. Its totient is φ = 10251696.

The previous prime is 21235657. The next prime is 21235723. The reversal of 21235714 is 41753212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20857489 + 378225 = 4567^2 + 615^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183009 + ... + 183124.

Almost surely, 2^21235714 is an apocalyptic number.

21235714 is a deficient number, since it is larger than the sum of its proper divisors (11716346).

21235714 is a wasteful number, since it uses less digits than its factorization.

21235714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366164.

The product of its digits is 1680, while the sum is 25.

The square root of 21235714 is about 4608.2224338675. Note that the first 3 decimals coincide. The cubic root of 21235714 is about 276.9208286815.

Adding to 21235714 its reverse (41753212), we get a palindrome (62988926).

The spelling of 21235714 in words is "twenty-one million, two hundred thirty-five thousand, seven hundred fourteen".