20255113012134 has 768 divisors, whose sum is σ = 59178540072960. Its totient is φ = 4460497735680.

The previous prime is 20255113012133. The next prime is 20255113012159. The reversal of 20255113012134 is 43121031155202.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20255113012133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 11515128747 + ... + 11515130505.

It is an arithmetic number, because the mean of its divisors is an integer number (77055390720).

Almost surely, 2^{20255113012134} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20255113012134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29589270036480).

20255113012134 is an abundant number, since it is smaller than the sum of its proper divisors (38923427060826).

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

20255113012134 is a wasteful number, since it uses less digits than its factorization.

20255113012134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993 (or 1974 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 20255113012134 its reverse (43121031155202), we get a palindrome (63376144167336).

The spelling of 20255113012134 in words is "twenty trillion, two hundred fifty-five billion, one hundred thirteen million, twelve thousand, one hundred thirty-four".