13423400105520 has 80 divisors (see below), whose sum is σ = 41732461451520. Its totient is φ = 3569257565952.

The previous prime is 13423400105519. The next prime is 13423400105551. The reversal of 13423400105520 is 2550100432431.

13423400105520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-5 number, since 5×13423400105520⁵ (a number of 67 digits) contains 55555 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80508700 + ... + 80675259.

It is an arithmetic number, because the mean of its divisors is an integer number (521655768144).

Almost surely, 2^{13423400105520} is an apocalyptic number.

13423400105520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13423400105520 is an abundant number, since it is smaller than the sum of its proper divisors (28309061346000).

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

13423400105520 is a wasteful number, since it uses less digits than its factorization.

13423400105520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161184322 (or 161184316 counting only the distinct ones).

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

Adding to 13423400105520 its reverse (2550100432431), we get a palindrome (15973500537951).

The spelling of 13423400105520 in words is "thirteen trillion, four hundred twenty-three billion, four hundred million, one hundred five thousand, five hundred twenty".