18144019 has 8 divisors (see below), whose sum is σ = 18397520. Its totient is φ = 17892576.

The previous prime is 18144011. The next prime is 18144029. The reversal of 18144019 is 91044181.

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

It is a cyclic number.

It is not a de Polignac number, because 18144019 - 2³ = 18144011 is a prime.

It is a super-2 number, since 2×18144019² = 658410850944722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18144011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25237 + ... + 25945.

It is an arithmetic number, because the mean of its divisors is an integer number (2299690).

Almost surely, 2^18144019 is an apocalyptic number.

18144019 is a deficient number, since it is larger than the sum of its proper divisors (253501).

18144019 is a wasteful number, since it uses less digits than its factorization.

18144019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 18144019 is about 4259.5796740993. The cubic root of 18144019 is about 262.7712401160.

The spelling of 18144019 in words is "eighteen million, one hundred forty-four thousand, nineteen".