13499131320 has 192 divisors, whose sum is σ = 45377280000. Its totient is φ = 3478235904.

The previous prime is 13499131297. The next prime is 13499131363. The reversal of 13499131320 is 2313199431.

13499131320 is a `hidden beast` number, since 1 + 3 + 499 + 131 + 32 + 0 = 666.

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 polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1331631 + ... + 1341729.

It is an arithmetic number, because the mean of its divisors is an integer number (236340000).

Almost surely, 2^13499131320 is an apocalyptic number.

13499131320 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 13499131320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22688640000).

13499131320 is an abundant number, since it is smaller than the sum of its proper divisors (31878148680).

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

13499131320 is a wasteful number, since it uses less digits than its factorization.

13499131320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10242 (or 10235 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The spelling of 13499131320 in words is "thirteen billion, four hundred ninety-nine million, one hundred thirty-one thousand, three hundred twenty".