13316872320 has 96 divisors (see below), whose sum is σ = 45984844620. Its totient is φ = 3551164416.

The previous prime is 13316872313. The next prime is 13316872339. The reversal of 13316872320 is 2327861331.

13316872320 is a `hidden beast` number, since 13 + 316 + 8 + 7 + 2 + 320 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13309775424 + 7096896 = 115368^2 + 2664^2 .

It is a tau number, because it is divible by the number of its divisors (96).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1150219 + ... + 1161738.

Almost surely, 2^13316872320 is an apocalyptic number.

13316872320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13316872320 is an abundant number, since it is smaller than the sum of its proper divisors (32667972300).

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

13316872320 is a wasteful number, since it uses less digits than its factorization.

13316872320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311982 (or 2311967 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 13316872320 in words is "thirteen billion, three hundred sixteen million, eight hundred seventy-two thousand, three hundred twenty".