13685818 has 16 divisors (see below), whose sum is σ = 21496320. Its totient is φ = 6526800.

The previous prime is 13685809. The next prime is 13685869. The reversal of 13685818 is 81858631.

It is a super-2 number, since 2×13685818² = 374603228658248, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2848 + ... + 5956.

It is an arithmetic number, because the mean of its divisors is an integer number (1343520).

Almost surely, 2^13685818 is an apocalyptic number.

13685818 is a deficient number, since it is larger than the sum of its proper divisors (7810502).

13685818 is a wasteful number, since it uses less digits than its factorization.

13685818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3213.

The product of its digits is 46080, while the sum is 40.

The square root of 13685818 is about 3699.4348216991. The cubic root of 13685818 is about 239.1976563232.

The spelling of 13685818 in words is "thirteen million, six hundred eighty-five thousand, eight hundred eighteen".