21076032 has 56 divisors (see below), whose sum is σ = 57578752. Its totient is φ = 6796800.

The previous prime is 21076019. The next prime is 21076037. The reversal of 21076032 is 23067012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21076037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4182 + ... + 7722.

It is an arithmetic number, because the mean of its divisors is an integer number (1028192).

Almost surely, 2^21076032 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 21076032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28789376).

21076032 is an abundant number, since it is smaller than the sum of its proper divisors (36502720).

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

21076032 is a wasteful number, since it uses less digits than its factorization.

21076032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3587 (or 3577 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 21076032 is about 4590.8639709754. The cubic root of 21076032 is about 276.2249793409.

The spelling of 21076032 in words is "twenty-one million, seventy-six thousand, thirty-two".