18116709 has 32 divisors (see below), whose sum is σ = 28600320. Its totient is φ = 10093248.

The previous prime is 18116687. The next prime is 18116719. The reversal of 18116709 is 90761181.

It is not a de Polignac number, because 18116709 - 2⁸ = 18116453 is a prime.

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 18116709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18116719) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16512 + ... + 17574.

It is an arithmetic number, because the mean of its divisors is an integer number (893760).

Almost surely, 2^18116709 is an apocalyptic number.

18116709 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18116709 is a deficient number, since it is larger than the sum of its proper divisors (10483611).

18116709 is a wasteful number, since it uses less digits than its factorization.

18116709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121.

The product of its (nonzero) digits is 3024, while the sum is 33.

The square root of 18116709 is about 4256.3727515339. The cubic root of 18116709 is about 262.6393346451.

The spelling of 18116709 in words is "eighteen million, one hundred sixteen thousand, seven hundred nine".