13243530420 has 36 divisors (see below), whose sum is σ = 40172042820. Its totient is φ = 3531608064.

The previous prime is 13243530401. The next prime is 13243530437. The reversal of 13243530420 is 2403534231.

13243530420 is a `hidden beast` number, since 1 + 324 + 35 + 304 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3656379024 + 9587151396 = 60468^2 + 97914^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36787405 + ... + 36787764.

Almost surely, 2^13243530420 is an apocalyptic number.

13243530420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13243530420 is an abundant number, since it is smaller than the sum of its proper divisors (26928512400).

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

13243530420 is a wasteful number, since it uses less digits than its factorization.

13243530420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73575184 (or 73575179 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The spelling of 13243530420 in words is "thirteen billion, two hundred forty-three million, five hundred thirty thousand, four hundred twenty".