18056709 has 24 divisors (see below), whose sum is σ = 29408960. Its totient is φ = 10941480.

The previous prime is 18056699. The next prime is 18056713. The reversal of 18056709 is 90765081.

It is not a de Polignac number, because 18056709 - 2⁵ = 18056677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18056719) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 504 + ... + 6030.

Almost surely, 2^18056709 is an apocalyptic number.

It is an amenable number.

18056709 is a deficient number, since it is larger than the sum of its proper divisors (11352251).

18056709 is a wasteful number, since it uses less digits than its factorization.

18056709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5558 (or 5541 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 18056709 is about 4249.3186512663. The cubic root of 18056709 is about 262.3490724227.

The spelling of 18056709 in words is "eighteen million, fifty-six thousand, seven hundred nine".