18143241 has 16 divisors (see below), whose sum is σ = 25272000. Its totient is φ = 11563328.

The previous prime is 18143239. The next prime is 18143249. The reversal of 18143241 is 14234181.

It is a cyclic number.

It is not a de Polignac number, because 18143241 - 2¹ = 18143239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18143249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8335 + ... + 10283.

It is an arithmetic number, because the mean of its divisors is an integer number (1579500).

Almost surely, 2^18143241 is an apocalyptic number.

It is an amenable number.

18143241 is a deficient number, since it is larger than the sum of its proper divisors (7128759).

18143241 is a wasteful number, since it uses less digits than its factorization.

18143241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088.

The product of its digits is 768, while the sum is 24.

The square root of 18143241 is about 4259.4883495556. The cubic root of 18143241 is about 262.7674842604.

The spelling of 18143241 in words is "eighteen million, one hundred forty-three thousand, two hundred forty-one".