18424964449 has 4 divisors (see below), whose sum is σ = 19394699440. Its totient is φ = 17455229460.

The previous prime is 18424964431. The next prime is 18424964461. The reversal of 18424964449 is 94446942481.

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 an emirpimes, since its reverse is a distinct semiprime: 94446942481 = 147811 ⋅638971.

It is a cyclic number.

It is not a de Polignac number, because 18424964449 - 2¹⁷ = 18424833377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18424964449.

It is not an unprimeable number, because it can be changed into a prime (18424964419) 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, 484867467 + ... + 484867504.

It is an arithmetic number, because the mean of its divisors is an integer number (4848674860).

Almost surely, 2^18424964449 is an apocalyptic number.

18424964449 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18424964449 is a deficient number, since it is larger than the sum of its proper divisors (969734991).

18424964449 is an equidigital number, since it uses as much as digits as its factorization.

18424964449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969734990.

The product of its digits is 7962624, while the sum is 55.

The spelling of 18424964449 in words is "eighteen billion, four hundred twenty-four million, nine hundred sixty-four thousand, four hundred forty-nine".