13680918 has 24 divisors (see below), whose sum is σ = 29780400. Its totient is φ = 4539024.

The previous prime is 13680911. The next prime is 13680941. The reversal of 13680918 is 81908631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13680911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2463 + ... + 5781.

It is an arithmetic number, because the mean of its divisors is an integer number (1240850).

Almost surely, 2^13680918 is an apocalyptic number.

13680918 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13680918 is an abundant number, since it is smaller than the sum of its proper divisors (16099482).

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

13680918 is a wasteful number, since it uses less digits than its factorization.

13680918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3556 (or 3553 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 13680918 is about 3698.7724990867. The cubic root of 13680918 is about 239.1691058820.

The spelling of 13680918 in words is "thirteen million, six hundred eighty thousand, nine hundred eighteen".