118837821 has 16 divisors (see below), whose sum is σ = 165410048. Its totient is φ = 75816000.

The previous prime is 118837801. The next prime is 118837843. The reversal of 118837821 is 128738811.

It is not a de Polignac number, because 118837821 - 2⁹ = 118837309 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 118837821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118837801) 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, 2005 + ... + 15546.

It is an arithmetic number, because the mean of its divisors is an integer number (10338128).

Almost surely, 2^118837821 is an apocalyptic number.

It is an amenable number.

118837821 is a deficient number, since it is larger than the sum of its proper divisors (46572227).

118837821 is a wasteful number, since it uses less digits than its factorization.

118837821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17652.

The product of its digits is 21504, while the sum is 39.

The square root of 118837821 is about 10901.2761179598. The cubic root of 118837821 is about 491.6449244176.

The spelling of 118837821 in words is "one hundred eighteen million, eight hundred thirty-seven thousand, eight hundred twenty-one".