18348971 has 4 divisors (see below), whose sum is σ = 18695232. Its totient is φ = 18002712.

The previous prime is 18348949. The next prime is 18348977. The reversal of 18348971 is 17984381.

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 18348971 - 2⁶ = 18348907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18348977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173051 + ... + 173156.

It is an arithmetic number, because the mean of its divisors is an integer number (4673808).

Almost surely, 2^18348971 is an apocalyptic number.

18348971 is a deficient number, since it is larger than the sum of its proper divisors (346261).

18348971 is an equidigital number, since it uses as much as digits as its factorization.

18348971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346260.

The product of its digits is 48384, while the sum is 41.

The square root of 18348971 is about 4283.5698897065. The cubic root of 18348971 is about 263.7569455281.

The spelling of 18348971 in words is "eighteen million, three hundred forty-eight thousand, nine hundred seventy-one".