13319987520 has 168 divisors, whose sum is σ = 49195780704. Its totient is φ = 3044557824.

The previous prime is 13319987519. The next prime is 13319987521. The reversal of 13319987520 is 2578991331.

It is an interprime number because it is at equal distance from previous prime (13319987519) and next prime (13319987521).

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 13319987520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13319987521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94542 + ... + 188621.

It is an arithmetic number, because the mean of its divisors is an integer number (292832028).

Almost surely, 2^13319987520 is an apocalyptic number.

13319987520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13319987520 is an abundant number, since it is smaller than the sum of its proper divisors (35875793184).

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

13319987520 is a wasteful number, since it uses less digits than its factorization.

13319987520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283197 (or 283180 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 48.

The spelling of 13319987520 in words is "thirteen billion, three hundred nineteen million, nine hundred eighty-seven thousand, five hundred twenty".