21305114 has 8 divisors (see below), whose sum is σ = 33837588. Its totient is φ = 10025920.

The previous prime is 21305113. The next prime is 21305149. The reversal of 21305114 is 41150312.

It can be written as a sum of positive squares in 2 ways, for example, as 21298225 + 6889 = 4615^2 + 83^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a junction number, because it is equal to n+sod(n) for n = 21305092 and 21305101.

It is not an unprimeable number, because it can be changed into a prime (21305113) 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, 313277 + ... + 313344.

Almost surely, 2^21305114 is an apocalyptic number.

21305114 is a deficient number, since it is larger than the sum of its proper divisors (12532474).

21305114 is a wasteful number, since it uses less digits than its factorization.

21305114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626640.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 21305114 is about 4615.7463101865. The cubic root of 21305114 is about 277.2221670744. Note that the first 3 decimals are identical.

Adding to 21305114 its reverse (41150312), we get a palindrome (62455426).

The spelling of 21305114 in words is "twenty-one million, three hundred five thousand, one hundred fourteen".