18679271 has 4 divisors (see below), whose sum is σ = 20116152. Its totient is φ = 17242392.

The previous prime is 18679249. The next prime is 18679273. The reversal of 18679271 is 17297681.

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 18679271 - 2⁶ = 18679207 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 (18679273) 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, 718421 + ... + 718446.

It is an arithmetic number, because the mean of its divisors is an integer number (5029038).

Almost surely, 2^18679271 is an apocalyptic number.

18679271 is a deficient number, since it is larger than the sum of its proper divisors (1436881).

18679271 is a wasteful number, since it uses less digits than its factorization.

18679271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436880.

The product of its digits is 42336, while the sum is 41.

The square root of 18679271 is about 4321.9522209298. The cubic root of 18679271 is about 265.3301734779.

The spelling of 18679271 in words is "eighteen million, six hundred seventy-nine thousand, two hundred seventy-one".