21560670606 has 8 divisors (see below), whose sum is σ = 43121341224. Its totient is φ = 7186890200.

The previous prime is 21560670569. The next prime is 21560670617. The reversal of 21560670606 is 60607606512.

It is a sphenic number, since it is the product of 3 distinct primes.

21560670606 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 1796722545 + ... + 1796722556.

It is an arithmetic number, because the mean of its divisors is an integer number (5390167653).

Almost surely, 2^21560670606 is an apocalyptic number.

21560670606 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21560670606 is a wasteful number, since it uses less digits than its factorization.

21560670606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3593445106.

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 21560670606 in words is "twenty-one billion, five hundred sixty million, six hundred seventy thousand, six hundred six".