18144254 has 4 divisors (see below), whose sum is σ = 27216384. Its totient is φ = 9072126.

The previous prime is 18144241. The next prime is 18144281. The reversal of 18144254 is 45244181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45244181 = 293 ⋅154417.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4536062 + ... + 4536065.

It is an arithmetic number, because the mean of its divisors is an integer number (6804096).

Almost surely, 2^18144254 is an apocalyptic number.

18144254 is a deficient number, since it is larger than the sum of its proper divisors (9072130).

18144254 is an equidigital number, since it uses as much as digits as its factorization.

18144254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9072129.

The product of its digits is 5120, while the sum is 29.

The square root of 18144254 is about 4259.6072588914. The cubic root of 18144254 is about 262.7723745757.

The spelling of 18144254 in words is "eighteen million, one hundred forty-four thousand, two hundred fifty-four".