13420235520 has 180 divisors, whose sum is σ = 48020427840. Its totient is φ = 3578701824.

The previous prime is 13420235503. The next prime is 13420235527. The reversal of 13420235520 is 2553202431.

It is a happy number.

13420235520 is a `hidden beast` number, since 1 + 3 + 420 + 235 + 5 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (13420235527) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 38961 + ... + 168399.

Almost surely, 2^13420235520 is an apocalyptic number.

13420235520 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 13420235520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24010213920).

13420235520 is an abundant number, since it is smaller than the sum of its proper divisors (34600192320).

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

13420235520 is an equidigital number, since it uses as much as digits as its factorization.

13420235520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129472 (or 129449 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 13420235520 its reverse (2553202431), we get a palindrome (15973437951).

The spelling of 13420235520 in words is "thirteen billion, four hundred twenty million, two hundred thirty-five thousand, five hundred twenty".