18147423 has 16 divisors (see below), whose sum is σ = 27856640. Its totient is φ = 10293696.

The previous prime is 18147421. The next prime is 18147457. The reversal of 18147423 is 32474181.

It is not a de Polignac number, because 18147423 - 2¹ = 18147421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18147421) 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, 190 + ... + 6027.

It is an arithmetic number, because the mean of its divisors is an integer number (1741040).

Almost surely, 2^18147423 is an apocalyptic number.

18147423 is a deficient number, since it is larger than the sum of its proper divisors (9709217).

18147423 is a wasteful number, since it uses less digits than its factorization.

18147423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6366.

The product of its digits is 5376, while the sum is 30.

The square root of 18147423 is about 4259.9792253015. The cubic root of 18147423 is about 262.7876719288.

The spelling of 18147423 in words is "eighteen million, one hundred forty-seven thousand, four hundred twenty-three".