118236013 has 4 divisors (see below), whose sum is σ = 135126880. Its totient is φ = 101345148.

The previous prime is 118236007. The next prime is 118236017. The reversal of 118236013 is 310632811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 118236013 - 2⁵ = 118235981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118236017) 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 3 ways as a sum of consecutive naturals, for example, 8445423 + ... + 8445436.

It is an arithmetic number, because the mean of its divisors is an integer number (33781720).

Almost surely, 2^118236013 is an apocalyptic number.

It is an amenable number.

118236013 is a deficient number, since it is larger than the sum of its proper divisors (16890867).

118236013 is an equidigital number, since it uses as much as digits as its factorization.

118236013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16890866.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 118236013 is about 10873.6384435018. The cubic root of 118236013 is about 490.8136045972.

Adding to 118236013 its reverse (310632811), we get a palindrome (428868824).

The spelling of 118236013 in words is "one hundred eighteen million, two hundred thirty-six thousand, thirteen".