20315306442112 has 128 divisors (see below), whose sum is σ = 46547226230400. Its totient is φ = 8734605373440.

The previous prime is 20315306442097. The next prime is 20315306442113. The reversal of 20315306442112 is 21124460351302.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315306442113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16611028 + ... + 17792044.

It is an arithmetic number, because the mean of its divisors is an integer number (363650204925).

Almost surely, 2^{20315306442112} is an apocalyptic number.

20315306442112 is a gapful number since it is divisible by the number (22) 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 20315306442112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23273613115200).

20315306442112 is an abundant number, since it is smaller than the sum of its proper divisors (26231919788288).

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

20315306442112 is a wasteful number, since it uses less digits than its factorization.

20315306442112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181704 (or 1181692 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 20315306442112 its reverse (21124460351302), we get a palindrome (41439766793414).

The spelling of 20315306442112 in words is "twenty trillion, three hundred fifteen billion, three hundred six million, four hundred forty-two thousand, one hundred twelve".