100818 has 16 divisors (see below), whose sum is σ = 224160. Its totient is φ = 33588.

The previous prime is 100811. The next prime is 100823. The reversal of 100818 is 818001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 100818.

It is not an unprimeable number, because it can be changed into a prime (100811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 880 + ... + 987.

It is an arithmetic number, because the mean of its divisors is an integer number (14010).

2¹⁰⁰⁸¹⁸ is an apocalyptic number.

100818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

100818 is an abundant number, since it is smaller than the sum of its proper divisors (123342).

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

100818 is a wasteful number, since it uses less digits than its factorization.

100818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878 (or 1872 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 100818 is about 317.5185033978. The cubic root of 100818 is about 46.5421054627.

Adding to 100818 its reverse (818001), we get a palindrome (918819).

The spelling of 100818 in words is "one hundred thousand, eight hundred eighteen".