20542454324144 has 80 divisors (see below), whose sum is σ = 41334142600320. Its totient is φ = 9878418063360.

The previous prime is 20542454324141. The next prime is 20542454324149. The reversal of 20542454324144 is 44142345424502.

It is a junction number, because it is equal to n+sod(n) for n = 20542454324095 and 20542454324104.

It is not an unprimeable number, because it can be changed into a prime (20542454324141) 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, 123875204 + ... + 124040924.

It is an arithmetic number, because the mean of its divisors is an integer number (516676782504).

Almost surely, 2^{20542454324144} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20542454324144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20667071300160).

20542454324144 is an abundant number, since it is smaller than the sum of its proper divisors (20791688276176).

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

20542454324144 is a wasteful number, since it uses less digits than its factorization.

20542454324144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166798 (or 166792 counting only the distinct ones).

The product of its (nonzero) digits is 2457600, while the sum is 44.

Adding to 20542454324144 its reverse (44142345424502), we get a palindrome (64684799748646).

The spelling of 20542454324144 in words is "twenty trillion, five hundred forty-two billion, four hundred fifty-four million, three hundred twenty-four thousand, one hundred forty-four".