13687914320 has 20 divisors (see below), whose sum is σ = 31824400980. Its totient is φ = 5475165696.

The previous prime is 13687914299. The next prime is 13687914323. The reversal of 13687914320 is 2341978631.

It can be written as a sum of positive squares in 2 ways, for example, as 3842512144 + 9845402176 = 61988^2 + 99224^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×13687914320² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13687914323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85549385 + ... + 85549544.

It is an arithmetic number, because the mean of its divisors is an integer number (1591220049).

Almost surely, 2^13687914320 is an apocalyptic number.

13687914320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13687914320 is an abundant number, since it is smaller than the sum of its proper divisors (18136486660).

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

13687914320 is a wasteful number, since it uses less digits than its factorization.

13687914320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171098942 (or 171098936 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 13687914320 in words is "thirteen billion, six hundred eighty-seven million, nine hundred fourteen thousand, three hundred twenty".