18140141 has 4 divisors (see below), whose sum is σ = 18160800. Its totient is φ = 18119484.

The previous prime is 18140137. The next prime is 18140153. The reversal of 18140141 is 14104181.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18140141 - 2² = 18140137 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 (18140131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8951 + ... + 10788.

It is an arithmetic number, because the mean of its divisors is an integer number (4540200).

Almost surely, 2^18140141 is an apocalyptic number.

It is an amenable number.

18140141 is a deficient number, since it is larger than the sum of its proper divisors (20659).

18140141 is an equidigital number, since it uses as much as digits as its factorization.

18140141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20658.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 18140141 is about 4259.1244405394. The cubic root of 18140141 is about 262.7525177025.

It can be divided in two parts, 18140 and 141, that added together give a palindrome (18281).

The spelling of 18140141 in words is "eighteen million, one hundred forty thousand, one hundred forty-one".