21096832 has 32 divisors (see below), whose sum is σ = 43017480. Its totient is φ = 10300416.

The previous prime is 21096799. The next prime is 21096839. The reversal of 21096832 is 23869012.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 21096794 and 21096803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21096839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3588 + ... + 7420.

Almost surely, 2^21096832 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 21096832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21508740).

21096832 is an abundant number, since it is smaller than the sum of its proper divisors (21920648).

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

21096832 is an equidigital number, since it uses as much as digits as its factorization.

21096832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3890 (or 3878 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 21096832 is about 4593.1287811251. The cubic root of 21096832 is about 276.3158185546.

The spelling of 21096832 in words is "twenty-one million, ninety-six thousand, eight hundred thirty-two".