118818621 has 12 divisors (see below), whose sum is σ = 179089248. Its totient is φ = 75768264.

The previous prime is 118818613. The next prime is 118818643. The reversal of 118818621 is 126818811.

It is a happy number.

118818621 is a `hidden beast` number, since 1 + 18 + 8 + 18 + 621 = 666.

It is not a de Polignac number, because 118818621 - 2³ = 118818613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118818221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 286795 + ... + 287208.

It is an arithmetic number, because the mean of its divisors is an integer number (14924104).

Almost surely, 2^118818621 is an apocalyptic number.

It is an amenable number.

118818621 is a deficient number, since it is larger than the sum of its proper divisors (60270627).

118818621 is a wasteful number, since it uses less digits than its factorization.

118818621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574032 (or 574029 counting only the distinct ones).

The product of its digits is 6144, while the sum is 36.

The square root of 118818621 is about 10900.3954515421. The cubic root of 118818621 is about 491.6184454990.

It can be divided in two parts, 11881 and 8621, that added together give a palindrome (20502).

The spelling of 118818621 in words is "one hundred eighteen million, eight hundred eighteen thousand, six hundred twenty-one".