13425320538 has 40 divisors (see below), whose sum is σ = 34380188832. Its totient is φ = 3835805544.

The previous prime is 13425320509. The next prime is 13425320539. The reversal of 13425320538 is 83502352431.

13425320538 is a `hidden beast` number, since 13 + 42 + 53 + 20 + 538 = 666.

It is not an unprimeable number, because it can be changed into a prime (13425320539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5918320 + ... + 5920587.

Almost surely, 2^13425320538 is an apocalyptic number.

13425320538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13425320538 is an abundant number, since it is smaller than the sum of its proper divisors (20954868294).

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

13425320538 is a wasteful number, since it uses less digits than its factorization.

13425320538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11838928 (or 11838919 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 13425320538 its reverse (83502352431), we get a palindrome (96927672969).

The spelling of 13425320538 in words is "thirteen billion, four hundred twenty-five million, three hundred twenty thousand, five hundred thirty-eight".