18079685 has 8 divisors (see below), whose sum is σ = 23364600. Its totient is φ = 13351104.

The previous prime is 18079669. The next prime is 18079709. The reversal of 18079685 is 58697081.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 498436 + 17581249 = 706^2 + 4193^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18079685 - 2⁴ = 18079669 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139010 + ... + 139139.

It is an arithmetic number, because the mean of its divisors is an integer number (2920575).

Almost surely, 2^18079685 is an apocalyptic number.

It is an amenable number.

18079685 is a deficient number, since it is larger than the sum of its proper divisors (5284915).

18079685 is a wasteful number, since it uses less digits than its factorization.

18079685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278167.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 18079685 is about 4252.0212840483. The cubic root of 18079685 is about 262.4602993625.

The spelling of 18079685 in words is "eighteen million, seventy-nine thousand, six hundred eighty-five".