20630634606 has 64 divisors (see below), whose sum is σ = 48340800000. Its totient is φ = 6503867136.

The previous prime is 20630634581. The next prime is 20630634611. The reversal of 20630634606 is 60643603602.

20630634606 is a `hidden beast` number, since 2 + 0 + 6 + 306 + 346 + 0 + 6 = 666.

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 31 ways as a sum of consecutive naturals, for example, 597790 + ... + 631358.

It is an arithmetic number, because the mean of its divisors is an integer number (755325000).

Almost surely, 2^20630634606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20630634606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24170400000).

20630634606 is an abundant number, since it is smaller than the sum of its proper divisors (27710165394).

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

20630634606 is a wasteful number, since it uses less digits than its factorization.

20630634606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34198 (or 34192 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 36.

The spelling of 20630634606 in words is "twenty billion, six hundred thirty million, six hundred thirty-four thousand, six hundred six".