118311820 has 24 divisors (see below), whose sum is σ = 271042128. Its totient is φ = 43022400.

The previous prime is 118311763. The next prime is 118311821. The reversal of 118311820 is 28113811.

It is not an unprimeable number, because it can be changed into a prime (118311821) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 268671 + ... + 269110.

It is an arithmetic number, because the mean of its divisors is an integer number (11293422).

Almost surely, 2^118311820 is an apocalyptic number.

118311820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

118311820 is an abundant number, since it is smaller than the sum of its proper divisors (152730308).

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

118311820 is a wasteful number, since it uses less digits than its factorization.

118311820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537801 (or 537799 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 118311820 is about 10877.1237006848. The cubic root of 118311820 is about 490.9184772076.

The spelling of 118311820 in words is "one hundred eighteen million, three hundred eleven thousand, eight hundred twenty".