18750984005449 has 4 divisors (see below), whose sum is σ = 18750993439360. Its totient is φ = 18750974571540.

The previous prime is 18750984005447. The next prime is 18750984005477. The reversal of 18750984005449 is 94450048905781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18750984005449 - 2¹ = 18750984005447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18750984005447) 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, 447237 + ... + 6140194.

It is an arithmetic number, because the mean of its divisors is an integer number (4687748359840).

Almost surely, 2^{18750984005449} is an apocalyptic number.

It is an amenable number.

18750984005449 is a deficient number, since it is larger than the sum of its proper divisors (9433911).

18750984005449 is an equidigital number, since it uses as much as digits as its factorization.

18750984005449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9433910.

The product of its (nonzero) digits is 58060800, while the sum is 64.

The spelling of 18750984005449 in words is "eighteen trillion, seven hundred fifty billion, nine hundred eighty-four million, five thousand, four hundred forty-nine".