18273234 has 32 divisors (see below), whose sum is σ = 42560640. Its totient is φ = 5121792.

The previous prime is 18273209. The next prime is 18273239. The reversal of 18273234 is 43237281.

It is a super-2 number, since 2×18273234² = 667822161637512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18273239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1879 + ... + 6330.

It is an arithmetic number, because the mean of its divisors is an integer number (1330020).

Almost surely, 2^18273234 is an apocalyptic number.

18273234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18273234 is an abundant number, since it is smaller than the sum of its proper divisors (24287406).

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

18273234 is a wasteful number, since it uses less digits than its factorization.

18273234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8274.

The product of its digits is 8064, while the sum is 30.

The square root of 18273234 is about 4274.7203417300. The cubic root of 18273234 is about 263.3935517182.

The spelling of 18273234 in words is "eighteen million, two hundred seventy-three thousand, two hundred thirty-four".