18194423 has 8 divisors (see below), whose sum is σ = 19964448. Its totient is φ = 16477344.

The previous prime is 18194413. The next prime is 18194431. The reversal of 18194423 is 32449181.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18194423 - 2⁸ = 18194167 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18194423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18194413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12515 + ... + 13892.

It is an arithmetic number, because the mean of its divisors is an integer number (2495556).

Almost surely, 2^18194423 is an apocalyptic number.

18194423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18194423 is a deficient number, since it is larger than the sum of its proper divisors (1770025).

18194423 is a wasteful number, since it uses less digits than its factorization.

18194423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26473.

The product of its digits is 6912, while the sum is 32.

The square root of 18194423 is about 4265.4921169778. The cubic root of 18194423 is about 263.0143409029.

The spelling of 18194423 in words is "eighteen million, one hundred ninety-four thousand, four hundred twenty-three".