20630561120136 has 96 divisors (see below), whose sum is σ = 60959432682720. Its totient is φ = 6251120870400.

The previous prime is 20630561120011. The next prime is 20630561120171. The reversal of 20630561120136 is 63102116503602.

20630561120136 is a `hidden beast` number, since 2 + 0 + 6 + 3 + 0 + 5 + 611 + 2 + 0 + 1 + 36 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20630561120136.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7645656 + ... + 9985848.

It is an arithmetic number, because the mean of its divisors is an integer number (634994090445).

Almost surely, 2^{20630561120136} is an apocalyptic number.

It is an amenable number.

20630561120136 is an abundant number, since it is smaller than the sum of its proper divisors (40328871562584).

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

20630561120136 is a wasteful number, since it uses less digits than its factorization.

20630561120136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2351347 (or 2351340 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

Adding to 20630561120136 its reverse (63102116503602), we get a palindrome (83732677623738).

The spelling of 20630561120136 in words is "twenty trillion, six hundred thirty billion, five hundred sixty-one million, one hundred twenty thousand, one hundred thirty-six".