18234423 has 16 divisors (see below), whose sum is σ = 28189440. Its totient is φ = 11627352.

The previous prime is 18234383. The next prime is 18234427. The reversal of 18234423 is 32443281.

18234423 is a `hidden beast` number, since 1 + 8 + 234 + 423 = 666.

It is not a de Polignac number, because 18234423 - 2²¹ = 16137271 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18234427) 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, 14061 + ... + 15302.

It is an arithmetic number, because the mean of its divisors is an integer number (1761840).

Almost surely, 2^18234423 is an apocalyptic number.

18234423 is a deficient number, since it is larger than the sum of its proper divisors (9955017).

18234423 is a wasteful number, since it uses less digits than its factorization.

18234423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29395 (or 29389 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 18234423 is about 4270.1783335125. The cubic root of 18234423 is about 263.2069433887.

The spelling of 18234423 in words is "eighteen million, two hundred thirty-four thousand, four hundred twenty-three".