18243876 has 144 divisors (see below), whose sum is σ = 55157760. Its totient is φ = 4656960.

The previous prime is 18243851. The next prime is 18243877. The reversal of 18243876 is 67834281.

It is not an unprimeable number, because it can be changed into a prime (18243877) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 256921 + ... + 256991.

It is an arithmetic number, because the mean of its divisors is an integer number (383040).

Almost surely, 2^18243876 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18243876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27578880).

18243876 is an abundant number, since it is smaller than the sum of its proper divisors (36913884).

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

18243876 is a wasteful number, since it uses less digits than its factorization.

18243876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 125 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 18243876 is about 4271.2850525340. The cubic root of 18243876 is about 263.2524190148.

The spelling of 18243876 in words is "eighteen million, two hundred forty-three thousand, eight hundred seventy-six".