18348671 has 4 divisors (see below), whose sum is σ = 20016744. Its totient is φ = 16680600.

The previous prime is 18348667. The next prime is 18348691. The reversal of 18348671 is 17684381.

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 18348671 - 2² = 18348667 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18348611) 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, 834020 + ... + 834041.

It is an arithmetic number, because the mean of its divisors is an integer number (5004186).

Almost surely, 2^18348671 is an apocalyptic number.

18348671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18348671 is a deficient number, since it is larger than the sum of its proper divisors (1668073).

18348671 is a wasteful number, since it uses less digits than its factorization.

18348671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668072.

The product of its digits is 32256, while the sum is 38.

The square root of 18348671 is about 4283.5348720420. The cubic root of 18348671 is about 263.7555080721.

The spelling of 18348671 in words is "eighteen million, three hundred forty-eight thousand, six hundred seventy-one".