118818321 has 16 divisors (see below), whose sum is σ = 168360768. Its totient is φ = 74278400.

The previous prime is 118818317. The next prime is 118818347. The reversal of 118818321 is 123818811.

It is a cyclic number.

It is not a de Polignac number, because 118818321 - 2² = 118818317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118818311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10186 + ... + 18476.

It is an arithmetic number, because the mean of its divisors is an integer number (10522548).

Almost surely, 2^118818321 is an apocalyptic number.

It is an amenable number.

118818321 is a deficient number, since it is larger than the sum of its proper divisors (49542447).

118818321 is a wasteful number, since it uses less digits than its factorization.

118818321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8592.

The product of its digits is 3072, while the sum is 33.

The square root of 118818321 is about 10900.3816905648. The cubic root of 118818321 is about 491.6180317433.

It can be divided in two parts, 11881 and 8321, that added together give a palindrome (20202).

The spelling of 118818321 in words is "one hundred eighteen million, eight hundred eighteen thousand, three hundred twenty-one".