21410216 has 32 divisors (see below), whose sum is σ = 41527200. Its totient is φ = 10342080.

The previous prime is 21410189. The next prime is 21410219. The reversal of 21410216 is 61201412.

It is a junction number, because it is equal to n+sod(n) for n = 21410194 and 21410203.

It is not an unprimeable number, because it can be changed into a prime (21410219) 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 7 ways as a sum of consecutive naturals, for example, 37211 + ... + 37781.

It is an arithmetic number, because the mean of its divisors is an integer number (1297725).

Almost surely, 2^21410216 is an apocalyptic number.

It is an amenable number.

21410216 is a deficient number, since it is larger than the sum of its proper divisors (20116984).

21410216 is a wasteful number, since it uses less digits than its factorization.

21410216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729 (or 725 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 21410216 is about 4627.1174612279. The cubic root of 21410216 is about 277.6772819517.

Adding to 21410216 its reverse (61201412), we get a palindrome (82611628).

The spelling of 21410216 in words is "twenty-one million, four hundred ten thousand, two hundred sixteen".