18144201199 has 4 divisors (see below), whose sum is σ = 18933079536. Its totient is φ = 17355322864.

The previous prime is 18144201197. The next prime is 18144201227. The reversal of 18144201199 is 99110244181.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18144201199 - 2¹ = 18144201197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18144201193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394439134 + ... + 394439179.

It is an arithmetic number, because the mean of its divisors is an integer number (4733269884).

Almost surely, 2^18144201199 is an apocalyptic number.

18144201199 is a deficient number, since it is larger than the sum of its proper divisors (788878337).

18144201199 is an equidigital number, since it uses as much as digits as its factorization.

18144201199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788878336.

The product of its (nonzero) digits is 20736, while the sum is 40.

The spelling of 18144201199 in words is "eighteen billion, one hundred forty-four million, two hundred one thousand, one hundred ninety-nine".