18234018 has 32 divisors (see below), whose sum is σ = 44205120. Its totient is φ = 5525280.

The previous prime is 18234017. The next prime is 18234023. The reversal of 18234018 is 81043281.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18233982 and 18234000.

It is not an unprimeable number, because it can be changed into a prime (18234017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14755 + ... + 15942.

It is an arithmetic number, because the mean of its divisors is an integer number (1381410).

Almost surely, 2^18234018 is an apocalyptic number.

18234018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18234018 is an abundant number, since it is smaller than the sum of its proper divisors (25971102).

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

18234018 is a wasteful number, since it uses less digits than its factorization.

18234018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30719 (or 30713 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 18234018 is about 4270.1309113422. The cubic root of 18234018 is about 263.2049947008.

Adding to 18234018 its reverse (81043281), we get a palindrome (99277299).

The spelling of 18234018 in words is "eighteen million, two hundred thirty-four thousand, eighteen".