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18042 = 233197
BaseRepresentation
bin100011001111010
3220202020
410121322
51034132
6215310
7103413
oct43172
926666
1018042
1112612
12a536
13829b
14680a
15552c
hex467a

18042 has 16 divisors (see below), whose sum is σ = 37632. Its totient is φ = 5760.

The previous prime is 18041. The next prime is 18043. The reversal of 18042 is 24081.

It is an interprime number because it is at equal distance from previous prime (18041) and next prime (18043).

It is a plaindrome in base 9 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138 + ... + 234.

It is an arithmetic number, because the mean of its divisors is an integer number (2352).

218042 is an apocalyptic number.

18042 is an abundant number, since it is smaller than the sum of its proper divisors (19590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18816).

18042 is a wasteful number, since it uses less digits than its factorization.

18042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 18042 is about 134.3205122087. The cubic root of 18042 is about 26.2277816529.

It can be divided in two parts, 180 and 42, that added together give a palindrome (222).

The spelling of 18042 in words is "eighteen thousand, forty-two".

Divisors: 1 2 3 6 31 62 93 97 186 194 291 582 3007 6014 9021 18042