20531542017248 has 144 divisors (see below), whose sum is σ = 44033083027920. Its totient is φ = 9397327104000.

The previous prime is 20531542017247. The next prime is 20531542017293. The reversal of 20531542017248 is 84271024513502.

It is a junction number, because it is equal to n+sod(n) for n = 20531542017199 and 20531542017208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20531542017247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 386187788 + ... + 386240948.

It is an arithmetic number, because the mean of its divisors is an integer number (305785298805).

Almost surely, 2^{20531542017248} 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 20531542017248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22016541513960).

20531542017248 is an abundant number, since it is smaller than the sum of its proper divisors (23501541010672).

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

20531542017248 is a wasteful number, since it uses less digits than its factorization.

20531542017248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53913 (or 53874 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 44.

The spelling of 20531542017248 in words is "twenty trillion, five hundred thirty-one billion, five hundred forty-two million, seventeen thousand, two hundred forty-eight".