13680518 has 8 divisors (see below), whose sum is σ = 21228480. Its totient is φ = 6604360.

The previous prime is 13680479. The next prime is 13680539. The reversal of 13680518 is 81508631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117878 + ... + 117993.

It is an arithmetic number, because the mean of its divisors is an integer number (2653560).

Almost surely, 2^13680518 is an apocalyptic number.

13680518 is a deficient number, since it is larger than the sum of its proper divisors (7547962).

13680518 is a wasteful number, since it uses less digits than its factorization.

13680518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235902.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 13680518 is about 3698.7184266986. The cubic root of 13680518 is about 239.1667749328.

The spelling of 13680518 in words is "thirteen million, six hundred eighty thousand, five hundred eighteen".