21352296 has 64 divisors (see below), whose sum is σ = 61488000. Its totient is φ = 6052608.

The previous prime is 21352291. The next prime is 21352343. The reversal of 21352296 is 69225312.

It is not an unprimeable number, because it can be changed into a prime (21352291) 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, 24606 + ... + 25458.

It is an arithmetic number, because the mean of its divisors is an integer number (960750).

Almost surely, 2^21352296 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 21352296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30744000).

21352296 is an abundant number, since it is smaller than the sum of its proper divisors (40135704).

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

21352296 is a wasteful number, since it uses less digits than its factorization.

21352296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018 (or 1014 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 21352296 is about 4620.8544664380. The cubic root of 21352296 is about 277.4266602716.

The spelling of 21352296 in words is "twenty-one million, three hundred fifty-two thousand, two hundred ninety-six".