18042741 has 24 divisors (see below), whose sum is σ = 27495936. Its totient is φ = 11378400.

The previous prime is 18042721. The next prime is 18042743. The reversal of 18042741 is 14724081.

It is not a de Polignac number, because 18042741 - 2¹⁴ = 18026357 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18042743) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20476 + ... + 21338.

It is an arithmetic number, because the mean of its divisors is an integer number (1145664).

Almost surely, 2^18042741 is an apocalyptic number.

It is an amenable number.

18042741 is a deficient number, since it is larger than the sum of its proper divisors (9453195).

18042741 is a wasteful number, since it uses less digits than its factorization.

18042741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993 (or 990 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 18042741 is about 4247.6747756861. The cubic root of 18042741 is about 262.2814071363.

The spelling of 18042741 in words is "eighteen million, forty-two thousand, seven hundred forty-one".