13318991520 has 48 divisors (see below), whose sum is σ = 41954824800. Its totient is φ = 3551730944.

The previous prime is 13318991519. The next prime is 13318991533. The reversal of 13318991520 is 2519981331.

It is a tau number, because it is divible by the number of its divisors (48).

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 7 ways as a sum of consecutive naturals, for example, 13873470 + ... + 13874429.

It is an arithmetic number, because the mean of its divisors is an integer number (874058850).

Almost surely, 2^13318991520 is an apocalyptic number.

13318991520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13318991520 is an abundant number, since it is smaller than the sum of its proper divisors (28635833280).

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

13318991520 is a wasteful number, since it uses less digits than its factorization.

13318991520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27747917 (or 27747909 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 42.

The spelling of 13318991520 in words is "thirteen billion, three hundred eighteen million, nine hundred ninety-one thousand, five hundred twenty".