18084231 has 24 divisors (see below), whose sum is σ = 29272464. Its totient is φ = 10661760.

The previous prime is 18084229. The next prime is 18084247. The reversal of 18084231 is 13248081.

It is not a de Polignac number, because 18084231 - 2¹ = 18084229 is a prime.

It is a super-2 number, since 2×18084231² = 654078821722722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18084195 and 18084204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18084211) 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 23 ways as a sum of consecutive naturals, for example, 1195 + ... + 6131.

It is an arithmetic number, because the mean of its divisors is an integer number (1219686).

Almost surely, 2^18084231 is an apocalyptic number.

18084231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18084231 is a deficient number, since it is larger than the sum of its proper divisors (11188233).

18084231 is a wasteful number, since it uses less digits than its factorization.

18084231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4991 (or 4988 counting only the distinct ones).

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

The square root of 18084231 is about 4252.5558197395. Note that the first 3 decimals coincide. The cubic root of 18084231 is about 262.4822954046.

The spelling of 18084231 in words is "eighteen million, eighty-four thousand, two hundred thirty-one".