118881918 has 48 divisors (see below), whose sum is σ = 282849840. Its totient is φ = 37293696.

The previous prime is 118881913. The next prime is 118881923. The reversal of 118881918 is 819188811.

It is an interprime number because it is at equal distance from previous prime (118881913) and next prime (118881923).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118881911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1068 + ... + 15456.

It is an arithmetic number, because the mean of its divisors is an integer number (5892705).

Almost surely, 2^118881918 is an apocalyptic number.

118881918 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 118881918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141424920).

118881918 is an abundant number, since it is smaller than the sum of its proper divisors (163967922).

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

118881918 is a wasteful number, since it uses less digits than its factorization.

118881918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14423 (or 14411 counting only the distinct ones).

The product of its digits is 36864, while the sum is 45.

The square root of 118881918 is about 10903.2984917409. The cubic root of 118881918 is about 491.7057282509.

The spelling of 118881918 in words is "one hundred eighteen million, eight hundred eighty-one thousand, nine hundred eighteen".