21316096 has 80 divisors (see below), whose sum is σ = 47139840. Its totient is φ = 9584640.

The previous prime is 21316091. The next prime is 21316109. The reversal of 21316096 is 69061312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21316091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269785 + ... + 269863.

It is an arithmetic number, because the mean of its divisors is an integer number (589248).

Almost surely, 2^21316096 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 21316096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23569920).

21316096 is an abundant number, since it is smaller than the sum of its proper divisors (25823744).

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

21316096 is an equidigital number, since it uses as much as digits as its factorization.

21316096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 21316096 is about 4616.9357803634. The cubic root of 21316096 is about 277.2697914912.

The spelling of 21316096 in words is "twenty-one million, three hundred sixteen thousand, ninety-six".