13245437520 has 400 divisors, whose sum is σ = 53448329088. Its totient is φ = 2977274880.

The previous prime is 13245437509. The next prime is 13245437531. The reversal of 13245437520 is 2573454231.

13245437520 is a `hidden beast` number, since 1 + 3 + 24 + 543 + 75 + 20 = 666.

13245437520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13245437509) and next prime (13245437531).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2764567 + ... + 2769353.

Almost surely, 2^13245437520 is an apocalyptic number.

13245437520 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 13245437520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26724164544).

13245437520 is an abundant number, since it is smaller than the sum of its proper divisors (40202891568).

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

13245437520 is a wasteful number, since it uses less digits than its factorization.

13245437520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4880 (or 4865 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The spelling of 13245437520 in words is "thirteen billion, two hundred forty-five million, four hundred thirty-seven thousand, five hundred twenty".