16118109 has 60 divisors (see below), whose sum is σ = 29132928. Its totient is φ = 8845200.

The previous prime is 16118087. The next prime is 16118111. The reversal of 16118109 is 90181161.

It is not a de Polignac number, because 16118109 - 2²⁰ = 15069533 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16118119) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 122974 + ... + 123104.

Almost surely, 2^16118109 is an apocalyptic number.

It is an amenable number.

16118109 is a deficient number, since it is larger than the sum of its proper divisors (13014819).

16118109 is a wasteful number, since it uses less digits than its factorization.

16118109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 27.

The square root of 16118109 is about 4014.7364795214. The cubic root of 16118109 is about 252.6027239453.

The spelling of 16118109 in words is "sixteen million, one hundred eighteen thousand, one hundred nine".