21330240606 has 12 divisors (see below), whose sum is σ = 46215521352. Its totient is φ = 7110080196.

The previous prime is 21330240563. The next prime is 21330240637. The reversal of 21330240606 is 60604203312.

21330240606 is a `hidden beast` number, since 2 + 1 + 3 + 30 + 24 + 0 + 606 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 21330240606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 592506666 + ... + 592506701.

It is an arithmetic number, because the mean of its divisors is an integer number (3851293446).

Almost surely, 2^21330240606 is an apocalyptic number.

21330240606 is an abundant number, since it is smaller than the sum of its proper divisors (24885280746).

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

21330240606 is a wasteful number, since it uses less digits than its factorization.

21330240606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185013375 (or 1185013372 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 21330240606 its reverse (60604203312), we get a palindrome (81934443918).

The spelling of 21330240606 in words is "twenty-one billion, three hundred thirty million, two hundred forty thousand, six hundred six".