18453449499 has 4 divisors (see below), whose sum is σ = 24604599336. Its totient is φ = 12302299664.

The previous prime is 18453449489. The next prime is 18453449501. The reversal of 18453449499 is 99494435481.

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 18453449499 - 2¹⁵ = 18453416731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18453449419) 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, 3075574914 + ... + 3075574919.

It is an arithmetic number, because the mean of its divisors is an integer number (6151149834).

Almost surely, 2^18453449499 is an apocalyptic number.

18453449499 is a deficient number, since it is larger than the sum of its proper divisors (6151149837).

18453449499 is an equidigital number, since it uses as much as digits as its factorization.

18453449499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6151149836.

The product of its digits is 22394880, while the sum is 60.

The spelling of 18453449499 in words is "eighteen billion, four hundred fifty-three million, four hundred forty-nine thousand, four hundred ninety-nine".