20544533354240 has 144 divisors (see below), whose sum is σ = 56245798060032. Its totient is φ = 7043196506112.

The previous prime is 20544533354171. The next prime is 20544533354273. The reversal of 20544533354240 is 4245333544502.

It is a junction number, because it is equal to n+sod(n) for n = 20544533354191 and 20544533354200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103720577 + ... + 103918463.

Almost surely, 2^{20544533354240} is an apocalyptic number.

20544533354240 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 20544533354240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28122899030016).

20544533354240 is an abundant number, since it is smaller than the sum of its proper divisors (35701264705792).

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

20544533354240 is a wasteful number, since it uses less digits than its factorization.

20544533354240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209502 (or 209488 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 44.

Adding to 20544533354240 its reverse (4245333544502), we get a palindrome (24789866898742).

The spelling of 20544533354240 in words is "twenty trillion, five hundred forty-four billion, five hundred thirty-three million, three hundred fifty-four thousand, two hundred forty".