18700085 has 16 divisors (see below), whose sum is σ = 25012800. Its totient is φ = 13337856.

The previous prime is 18700079. The next prime is 18700093. The reversal of 18700085 is 58000781.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18700085 - 2⁸ = 18699829 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4175 + ... + 7404.

It is an arithmetic number, because the mean of its divisors is an integer number (1563300).

Almost surely, 2^18700085 is an apocalyptic number.

It is an amenable number.

18700085 is a deficient number, since it is larger than the sum of its proper divisors (6312715).

18700085 is a wasteful number, since it uses less digits than its factorization.

18700085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11620.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 18700085 is about 4324.3594901442. The cubic root of 18700085 is about 265.4286878910.

The spelling of 18700085 in words is "eighteen million, seven hundred thousand, eighty-five".