117000018 has 64 divisors (see below), whose sum is σ = 276981120. Its totient is φ = 36481536.

The previous prime is 116999999. The next prime is 117000049. The reversal of 117000018 is 810000711.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 213621 + ... + 214167.

It is an arithmetic number, because the mean of its divisors is an integer number (4327830).

Almost surely, 2^117000018 is an apocalyptic number.

117000018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 117000018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138490560).

117000018 is an abundant number, since it is smaller than the sum of its proper divisors (159981102).

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

117000018 is a wasteful number, since it uses less digits than its factorization.

117000018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808 (or 802 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 18.

The square root of 117000018 is about 10816.6546584422. The cubic root of 117000018 is about 489.0973497328.

Adding to 117000018 its reverse (810000711), we get a palindrome (927000729).

The spelling of 117000018 in words is "one hundred seventeen million, eighteen", and thus it is an aban number.