13031603928 has 96 divisors (see below), whose sum is σ = 40368556800. Its totient is φ = 3720302784.

The previous prime is 13031603927. The next prime is 13031603947. The reversal of 13031603928 is 82930613031.

13031603928 is a `hidden beast` number, since 13 + 0 + 31 + 603 + 9 + 2 + 8 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 13031603892 and 13031603901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13031603927) 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, 654975 + ... + 674577.

It is an arithmetic number, because the mean of its divisors is an integer number (420505800).

Almost surely, 2^13031603928 is an apocalyptic number.

13031603928 is a gapful number since it is divisible by the number (18) 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 13031603928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20184278400).

13031603928 is an abundant number, since it is smaller than the sum of its proper divisors (27336952872).

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

13031603928 is a wasteful number, since it uses less digits than its factorization.

13031603928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20941 (or 20934 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The spelling of 13031603928 in words is "thirteen billion, thirty-one million, six hundred three thousand, nine hundred twenty-eight".