13140420350520 has 128 divisors (see below), whose sum is σ = 42617579788800. Its totient is φ = 3229963900416.

The previous prime is 13140420350513. The next prime is 13140420350527. The reversal of 13140420350520 is 2505302404131.

It is an interprime number because it is at equal distance from previous prime (13140420350513) and next prime (13140420350527).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13140420350527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77798644 + ... + 77967363.

It is an arithmetic number, because the mean of its divisors is an integer number (332949842100).

Almost surely, 2^{13140420350520} is an apocalyptic number.

13140420350520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13140420350520 is an abundant number, since it is smaller than the sum of its proper divisors (29477159438280).

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

13140420350520 is a wasteful number, since it uses less digits than its factorization.

13140420350520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155766077 (or 155766073 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 13140420350520 its reverse (2505302404131), we get a palindrome (15645722754651).

The spelling of 13140420350520 in words is "thirteen trillion, one hundred forty billion, four hundred twenty million, three hundred fifty thousand, five hundred twenty".