18142741 has 4 divisors (see below), whose sum is σ = 18152172. Its totient is φ = 18133312.

The previous prime is 18142717. The next prime is 18142753. The reversal of 18142741 is 14724181.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8352100 + 9790641 = 2890^2 + 3129^2 .

It is a cyclic number.

It is not a de Polignac number, because 18142741 - 2⁷ = 18142613 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 (18140741) 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 3 ways as a sum of consecutive naturals, for example, 676 + ... + 6061.

It is an arithmetic number, because the mean of its divisors is an integer number (4538043).

Almost surely, 2^18142741 is an apocalyptic number.

It is an amenable number.

18142741 is a deficient number, since it is larger than the sum of its proper divisors (9431).

18142741 is an equidigital number, since it uses as much as digits as its factorization.

18142741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9430.

The product of its digits is 1792, while the sum is 28.

The square root of 18142741 is about 4259.4296566559. The cubic root of 18142741 is about 262.7650704147.

The spelling of 18142741 in words is "eighteen million, one hundred forty-two thousand, seven hundred forty-one".