21876606 has 12 divisors (see below), whose sum is σ = 47399352. Its totient is φ = 7292196.

The previous prime is 21876593. The next prime is 21876623. The reversal of 21876606 is 60667812.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 607666 + ... + 607701.

It is an arithmetic number, because the mean of its divisors is an integer number (3949946).

Almost surely, 2^21876606 is an apocalyptic number.

21876606 is an abundant number, since it is smaller than the sum of its proper divisors (25522746).

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

21876606 is a wasteful number, since it uses less digits than its factorization.

21876606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215375 (or 1215372 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 21876606 is about 4677.2434189381. The cubic root of 21876606 is about 279.6790795984.

The spelling of 21876606 in words is "twenty-one million, eight hundred seventy-six thousand, six hundred six".