21896336 has 60 divisors (see below), whose sum is σ = 53858160. Its totient is φ = 8527680.

The previous prime is 21896333. The next prime is 21896339. The reversal of 21896336 is 63369812.

It is an interprime number because it is at equal distance from previous prime (21896333) and next prime (21896339).

It is a self number, because there is not a number n which added to its sum of digits gives 21896336.

It is not an unprimeable number, because it can be changed into a prime (21896333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7355 + ... + 9893.

It is an arithmetic number, because the mean of its divisors is an integer number (897636).

Almost surely, 2^21896336 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 21896336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26929080).

21896336 is an abundant number, since it is smaller than the sum of its proper divisors (31961824).

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

21896336 is a wasteful number, since it uses less digits than its factorization.

21896336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572 (or 2559 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

The square root of 21896336 is about 4679.3520919033. The cubic root of 21896336 is about 279.7631330114.

The spelling of 21896336 in words is "twenty-one million, eight hundred ninety-six thousand, three hundred thirty-six".