20315123044146 has 128 divisors (see below), whose sum is σ = 51894261342720. Its totient is φ = 5770624204800.

The previous prime is 20315123044133. The next prime is 20315123044157. The reversal of 20315123044146 is 64144032151302.

20315123044146 is a `hidden beast` number, since 2 + 0 + 3 + 1 + 5 + 1 + 230 + 4 + 414 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20315123044146.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 50412376 + ... + 50813756.

It is an arithmetic number, because the mean of its divisors is an integer number (405423916740).

Almost surely, 2^{20315123044146} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20315123044146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25947130671360).

20315123044146 is an abundant number, since it is smaller than the sum of its proper divisors (31579138298574).

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

20315123044146 is a wasteful number, since it uses less digits than its factorization.

20315123044146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402177 (or 402171 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 20315123044146 its reverse (64144032151302), we get a palindrome (84459155195448).

The spelling of 20315123044146 in words is "twenty trillion, three hundred fifteen billion, one hundred twenty-three million, forty-four thousand, one hundred forty-six".