13873618 has 12 divisors (see below), whose sum is σ = 22874670. Its totient is φ = 6306080.

The previous prime is 13873609. The next prime is 13873627. The reversal of 13873618 is 81637831.

It is an interprime number because it is at equal distance from previous prime (13873609) and next prime (13873627).

It can be written as a sum of positive squares in only one way, i.e., 13741849 + 131769 = 3707^2 + 363^2 .

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 5 ways as a sum of consecutive naturals, for example, 28423 + ... + 28906.

Almost surely, 2^13873618 is an apocalyptic number.

13873618 is a deficient number, since it is larger than the sum of its proper divisors (9001052).

13873618 is a wasteful number, since it uses less digits than its factorization.

13873618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57353 (or 57342 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 13873618 is about 3724.7305942846. The cubic root of 13873618 is about 240.2867983451.

It can be divided in two parts, 1387 and 3618, that added together give a palindrome (5005).

The spelling of 13873618 in words is "thirteen million, eight hundred seventy-three thousand, six hundred eighteen".