21410616 has 64 divisors (see below), whose sum is σ = 57365280. Its totient is φ = 6635520.

The previous prime is 21410611. The next prime is 21410617. The reversal of 21410616 is 61601412.

It is a junction number, because it is equal to n+sod(n) for n = 21410592 and 21410601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21410611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39306 + ... + 39846.

Almost surely, 2^21410616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21410616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28682640).

21410616 is an abundant number, since it is smaller than the sum of its proper divisors (35954664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21410616 is a wasteful number, since it uses less digits than its factorization.

21410616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 21410616 is about 4627.1606844803. The cubic root of 21410616 is about 277.6790111919.

The spelling of 21410616 in words is "twenty-one million, four hundred ten thousand, six hundred sixteen".