13671618 has 32 divisors (see below), whose sum is σ = 28200960. Its totient is φ = 4416720.

The previous prime is 13671613. The next prime is 13671649. The reversal of 13671618 is 81617631.

It is not an unprimeable number, because it can be changed into a prime (13671613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28303 + ... + 28781.

It is an arithmetic number, because the mean of its divisors is an integer number (881280).

Almost surely, 2^13671618 is an apocalyptic number.

13671618 is an abundant number, since it is smaller than the sum of its proper divisors (14529342).

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

13671618 is a wasteful number, since it uses less digits than its factorization.

13671618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622.

The product of its digits is 6048, while the sum is 33.

The square root of 13671618 is about 3697.5151115310. The cubic root of 13671618 is about 239.1148995566.

The spelling of 13671618 in words is "thirteen million, six hundred seventy-one thousand, six hundred eighteen".