21416307 has 16 divisors (see below), whose sum is σ = 31664640. Its totient is φ = 12765600.

The previous prime is 21416281. The next prime is 21416321. The reversal of 21416307 is 70361412.

It is not a de Polignac number, because 21416307 - 2⁸ = 21416051 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (21416387) 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, 3307 + ... + 7332.

It is an arithmetic number, because the mean of its divisors is an integer number (1979040).

Almost surely, 2^21416307 is an apocalyptic number.

21416307 is a deficient number, since it is larger than the sum of its proper divisors (10248333).

21416307 is a wasteful number, since it uses less digits than its factorization.

21416307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10714.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 21416307 is about 4627.7755995726. The cubic root of 21416307 is about 277.7036116247.

Adding to 21416307 its reverse (70361412), we get a palindrome (91777719).

It can be divided in two parts, 2141 and 6307, that added together give a palindrome (8448).

The spelling of 21416307 in words is "twenty-one million, four hundred sixteen thousand, three hundred seven".