12340202013520 has 20 divisors (see below), whose sum is σ = 28690969681620. Its totient is φ = 4936080805376.

The previous prime is 12340202013511. The next prime is 12340202013539. The reversal of 12340202013520 is 2531020204321.

It can be written as a sum of positive squares in 2 ways, for example, as 4340672231184 + 7999529782336 = 2083428^2 + 2828344^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77126262505 + ... + 77126262664.

It is an arithmetic number, because the mean of its divisors is an integer number (1434548484081).

Almost surely, 2^{12340202013520} is an apocalyptic number.

12340202013520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12340202013520 is an abundant number, since it is smaller than the sum of its proper divisors (16350767668100).

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

12340202013520 is a wasteful number, since it uses less digits than its factorization.

12340202013520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154252525182 (or 154252525176 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 12340202013520 its reverse (2531020204321), we get a palindrome (14871222217841).

The spelling of 12340202013520 in words is "twelve trillion, three hundred forty billion, two hundred two million, thirteen thousand, five hundred twenty".