20510135113560 has 128 divisors (see below), whose sum is σ = 62860554316800. Its totient is φ = 5351211648000.

The previous prime is 20510135113543. The next prime is 20510135113561. The reversal of 20510135113560 is 6531153101502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20510135113561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16319751 + ... + 17531529.

It is an arithmetic number, because the mean of its divisors is an integer number (491098080600).

Almost surely, 2^{20510135113560} is an apocalyptic number.

20510135113560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20510135113560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31430277158400).

20510135113560 is an abundant number, since it is smaller than the sum of its proper divisors (42350419203240).

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

20510135113560 is a wasteful number, since it uses less digits than its factorization.

20510135113560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214841 (or 1214837 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 33.

The spelling of 20510135113560 in words is "twenty trillion, five hundred ten billion, one hundred thirty-five million, one hundred thirteen thousand, five hundred sixty".