13520420055 has 24 divisors (see below), whose sum is σ = 23642796528. Its totient is φ = 7147074816.

The previous prime is 13520419987. The next prime is 13520420057. The reversal of 13520420055 is 55002402531.

It is a happy number.

It is not a de Polignac number, because 13520420055 - 2²⁷ = 13386202327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13520420057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1324357 + ... + 1334526.

It is an arithmetic number, because the mean of its divisors is an integer number (985116522).

Almost surely, 2^13520420055 is an apocalyptic number.

13520420055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13520420055 is a deficient number, since it is larger than the sum of its proper divisors (10122376473).

13520420055 is a wasteful number, since it uses less digits than its factorization.

13520420055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2659007 (or 2659004 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

Adding to 13520420055 its reverse (55002402531), we get a palindrome (68522822586).

The spelling of 13520420055 in words is "thirteen billion, five hundred twenty million, four hundred twenty thousand, fifty-five".