18706071 has 4 divisors (see below), whose sum is σ = 24941432. Its totient is φ = 12470712.

The previous prime is 18706057. The next prime is 18706097. The reversal of 18706071 is 17060781.

18706071 is nontrivially palindromic in base 11.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 18706071 - 2⁶ = 18706007 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 (18706771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3117676 + ... + 3117681.

It is an arithmetic number, because the mean of its divisors is an integer number (6235358).

Almost surely, 2^18706071 is an apocalyptic number.

18706071 is a deficient number, since it is larger than the sum of its proper divisors (6235361).

18706071 is an equidigital number, since it uses as much as digits as its factorization.

18706071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6235360.

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 18706071 is about 4325.0515603863. The cubic root of 18706071 is about 265.4570065969.

The spelling of 18706071 in words is "eighteen million, seven hundred six thousand, seventy-one".