18231134 has 16 divisors (see below), whose sum is σ = 28667520. Its totient is φ = 8679000.

The previous prime is 18231119. The next prime is 18231137. The reversal of 18231134 is 43113281.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18231137) 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, 10757 + ... + 12335.

It is an arithmetic number, because the mean of its divisors is an integer number (1791720).

Almost surely, 2^18231134 is an apocalyptic number.

18231134 is a deficient number, since it is larger than the sum of its proper divisors (10436386).

18231134 is a wasteful number, since it uses less digits than its factorization.

18231134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855.

The product of its digits is 576, while the sum is 23.

The square root of 18231134 is about 4269.7932034233. The cubic root of 18231134 is about 263.1911172835.

The spelling of 18231134 in words is "eighteen million, two hundred thirty-one thousand, one hundred thirty-four".