13113535420520 has 16 divisors (see below), whose sum is σ = 29505454696260. Its totient is φ = 5245414168192.

The previous prime is 13113535420511. The next prime is 13113535420529. The reversal of 13113535420520 is 2502453531131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13113535420511) and next prime (13113535420529).

It can be written as a sum of positive squares in 2 ways, for example, as 12773032827844 + 340502592676 = 3573938^2 + 583526^2 .

It is a super-2 number, since 2×13113535420520² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13113535420529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163919192717 + ... + 163919192796.

Almost surely, 2^{13113535420520} is an apocalyptic number.

13113535420520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13113535420520 is an abundant number, since it is smaller than the sum of its proper divisors (16391919275740).

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

13113535420520 is a wasteful number, since it uses less digits than its factorization.

13113535420520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327838385524 (or 327838385520 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 35.

Adding to 13113535420520 its reverse (2502453531131), we get a palindrome (15615988951651).

The spelling of 13113535420520 in words is "thirteen trillion, one hundred thirteen billion, five hundred thirty-five million, four hundred twenty thousand, five hundred twenty".