118434021 has 4 divisors (see below), whose sum is σ = 157912032. Its totient is φ = 78956012.

The previous prime is 118433983. The next prime is 118434047. The reversal of 118434021 is 120434811.

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 118434021 - 2¹⁵ = 118401253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 118433982 and 118434000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118434221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19739001 + ... + 19739006.

It is an arithmetic number, because the mean of its divisors is an integer number (39478008).

Almost surely, 2^118434021 is an apocalyptic number.

It is an amenable number.

118434021 is a deficient number, since it is larger than the sum of its proper divisors (39478011).

118434021 is an equidigital number, since it uses as much as digits as its factorization.

118434021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39478010.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 118434021 is about 10882.7395907464. The cubic root of 118434021 is about 491.0874377460.

Adding to 118434021 its reverse (120434811), we get a palindrome (238868832).

The spelling of 118434021 in words is "one hundred eighteen million, four hundred thirty-four thousand, twenty-one".