18142371 has 24 divisors (see below), whose sum is σ = 29200080. Its totient is φ = 10777536.

The previous prime is 18142367. The next prime is 18142381. The reversal of 18142371 is 17324181.

It is not a de Polignac number, because 18142371 - 2² = 18142367 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18142301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 720 + ... + 6066.

It is an arithmetic number, because the mean of its divisors is an integer number (1216670).

Almost surely, 2^18142371 is an apocalyptic number.

18142371 is a deficient number, since it is larger than the sum of its proper divisors (11057709).

18142371 is a wasteful number, since it uses less digits than its factorization.

18142371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5395 (or 5392 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 18142371 is about 4259.3862233895. The cubic root of 18142371 is about 262.7632841404.

The spelling of 18142371 in words is "eighteen million, one hundred forty-two thousand, three hundred seventy-one".