12543125662020 has 192 divisors, whose sum is σ = 35903421227520. Its totient is φ = 3270729326592.

The previous prime is 12543125662007. The next prime is 12543125662031. The reversal of 12543125662020 is 2026652134521.

It is a self number, because there is not a number n which added to its sum of digits gives 12543125662020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2525289577 + ... + 2525294543.

It is an arithmetic number, because the mean of its divisors is an integer number (186996985560).

Almost surely, 2^{12543125662020} is an apocalyptic number.

12543125662020 is a gapful number since it is divisible by the number (10) 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 12543125662020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17951710613760).

12543125662020 is an abundant number, since it is smaller than the sum of its proper divisors (23360295565500).

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

12543125662020 is a wasteful number, since it uses less digits than its factorization.

12543125662020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7534 (or 7532 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

Adding to 12543125662020 its reverse (2026652134521), we get a palindrome (14569777796541).

The spelling of 12543125662020 in words is "twelve trillion, five hundred forty-three billion, one hundred twenty-five million, six hundred sixty-two thousand, twenty".