21319296 has 64 divisors (see below), whose sum is σ = 57650400. Its totient is φ = 6978560.

The previous prime is 21319283. The next prime is 21319301. The reversal of 21319296 is 69291312.

It is a tau number, because it is divible by the number of its divisors (64).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22186 + ... + 23126.

Almost surely, 2^21319296 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 21319296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28825200).

21319296 is an abundant number, since it is smaller than the sum of its proper divisors (36331104).

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

21319296 is an equidigital number, since it uses as much as digits as its factorization.

21319296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017 (or 1005 counting only the distinct ones).

The product of its digits is 5832, while the sum is 33.

The square root of 21319296 is about 4617.2823175543. The cubic root of 21319296 is about 277.2836654973.

The spelling of 21319296 in words is "twenty-one million, three hundred nineteen thousand, two hundred ninety-six".