18787560449 has 24 divisors (see below), whose sum is σ = 23057612640. Its totient is φ = 15221291904.

The previous prime is 18787560413. The next prime is 18787560457. The reversal of 18787560449 is 94406578781.

It is not a de Polignac number, because 18787560449 - 2⁸ = 18787560193 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18787560479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 389657 + ... + 435209.

It is an arithmetic number, because the mean of its divisors is an integer number (960733860).

Almost surely, 2^18787560449 is an apocalyptic number.

18787560449 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18787560449 is a deficient number, since it is larger than the sum of its proper divisors (4270052191).

18787560449 is a wasteful number, since it uses less digits than its factorization.

18787560449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46029 (or 46022 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 59.

The spelling of 18787560449 in words is "eighteen billion, seven hundred eighty-seven million, five hundred sixty thousand, four hundred forty-nine".