21441606 has 32 divisors (see below), whose sum is σ = 44972928. Its totient is φ = 6807360.

The previous prime is 21441599. The next prime is 21441617. The reversal of 21441606 is 60614412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9565 + ... + 11591.

It is an arithmetic number, because the mean of its divisors is an integer number (1405404).

Almost surely, 2^21441606 is an apocalyptic number.

21441606 is an abundant number, since it is smaller than the sum of its proper divisors (23531322).

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

21441606 is a wasteful number, since it uses less digits than its factorization.

21441606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 21441606 is about 4630.5081794550. The cubic root of 21441606 is about 277.8129186594.

The spelling of 21441606 in words is "twenty-one million, four hundred forty-one thousand, six hundred six".