18042141 has 16 divisors (see below), whose sum is σ = 26349120. Its totient is φ = 10913280.

The previous prime is 18042139. The next prime is 18042149. The reversal of 18042141 is 14124081.

It is a happy number.

It is not a de Polignac number, because 18042141 - 2¹ = 18042139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18042149) 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, 1620 + ... + 6221.

It is an arithmetic number, because the mean of its divisors is an integer number (1646820).

Almost surely, 2^18042141 is an apocalyptic number.

It is an amenable number.

18042141 is a deficient number, since it is larger than the sum of its proper divisors (8306979).

18042141 is a wasteful number, since it uses less digits than its factorization.

18042141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7916.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 18042141 is about 4247.6041482229. The cubic root of 18042141 is about 262.2784997697.

The spelling of 18042141 in words is "eighteen million, forty-two thousand, one hundred forty-one".