13136205420 has 72 divisors (see below), whose sum is σ = 42911612016. Its totient is φ = 3233526912.

The previous prime is 13136205419. The next prime is 13136205443. The reversal of 13136205420 is 2450263131.

13136205420 is a `hidden beast` number, since 1 + 3 + 1 + 36 + 205 + 420 = 666.

It is an unprimeable number.

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, 2804542 + ... + 2809221.

Almost surely, 2^13136205420 is an apocalyptic number.

13136205420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13136205420 is an abundant number, since it is smaller than the sum of its proper divisors (29775406596).

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

13136205420 is a wasteful number, since it uses less digits than its factorization.

13136205420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5613791 (or 5613786 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 13136205420 its reverse (2450263131), we get a palindrome (15586468551).

The spelling of 13136205420 in words is "thirteen billion, one hundred thirty-six million, two hundred five thousand, four hundred twenty".