18242741 has 8 divisors (see below), whose sum is σ = 20239200. Its totient is φ = 16302640.

The previous prime is 18242737. The next prime is 18242743. The reversal of 18242741 is 14724281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18242741 - 2² = 18242737 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 (18242743) 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 7 ways as a sum of consecutive naturals, for example, 13406 + ... + 14703.

It is an arithmetic number, because the mean of its divisors is an integer number (2529900).

Almost surely, 2^18242741 is an apocalyptic number.

18242741 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18242741 is a deficient number, since it is larger than the sum of its proper divisors (1996459).

18242741 is a wasteful number, since it uses less digits than its factorization.

18242741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28179.

The product of its digits is 3584, while the sum is 29.

The square root of 18242741 is about 4271.1521864715. The cubic root of 18242741 is about 263.2469596907.

The spelling of 18242741 in words is "eighteen million, two hundred forty-two thousand, seven hundred forty-one".