18514871 has 4 divisors (see below), whose sum is σ = 18532992. Its totient is φ = 18496752.

The previous prime is 18514841. The next prime is 18514891. The reversal of 18514871 is 17841581.

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

It is a cyclic number.

It is not a de Polignac number, because 18514871 - 2¹⁸ = 18252727 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 (18514831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7430 + ... + 9603.

It is an arithmetic number, because the mean of its divisors is an integer number (4633248).

Almost surely, 2^18514871 is an apocalyptic number.

18514871 is a deficient number, since it is larger than the sum of its proper divisors (18121).

18514871 is a wasteful number, since it uses less digits than its factorization.

18514871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18120.

The product of its digits is 8960, while the sum is 35.

The square root of 18514871 is about 4302.8910048943. The cubic root of 18514871 is about 264.5494706299.

The spelling of 18514871 in words is "eighteen million, five hundred fourteen thousand, eight hundred seventy-one".