20125536716646 has 24 divisors (see below), whose sum is σ = 43605412091280. Its totient is φ = 6708499540656.

The previous prime is 20125536716641. The next prime is 20125536716717. The reversal of 20125536716646 is 64661763552102.

20125536716646 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 5 + 536 + 7 + 1 + 66 + 46 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20125536716592 and 20125536716601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20125536716641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17761735 + ... + 18860813.

It is an arithmetic number, because the mean of its divisors is an integer number (1816892170470).

Almost surely, 2^{20125536716646} is an apocalyptic number.

20125536716646 is an abundant number, since it is smaller than the sum of its proper divisors (23479875374634).

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

20125536716646 is a wasteful number, since it uses less digits than its factorization.

20125536716646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116380 (or 2116377 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 54.

The spelling of 20125536716646 in words is "twenty trillion, one hundred twenty-five billion, five hundred thirty-six million, seven hundred sixteen thousand, six hundred forty-six".