21076832 has 48 divisors (see below), whose sum is σ = 49496832. Its totient is φ = 8638080.

The previous prime is 21076813. The next prime is 21076841. The reversal of 21076832 is 23867012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21076795 and 21076804.

It is a congruent number.

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, 3107 + ... + 7197.

It is an arithmetic number, because the mean of its divisors is an integer number (1031184).

Almost surely, 2^21076832 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 21076832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24748416).

21076832 is an abundant number, since it is smaller than the sum of its proper divisors (28420000).

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

21076832 is a wasteful number, since it uses less digits than its factorization.

21076832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4131 (or 4123 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 21076832 is about 4590.9510997178. The cubic root of 21076832 is about 276.2284742617.

The spelling of 21076832 in words is "twenty-one million, seventy-six thousand, eight hundred thirty-two".