18475219487 has 4 divisors (see below), whose sum is σ = 19447599480. Its totient is φ = 17502839496.

The previous prime is 18475219447. The next prime is 18475219517. The reversal of 18475219487 is 78491257481.

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 18475219487 - 2²⁴ = 18458442271 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 (18475219417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486189968 + ... + 486190005.

It is an arithmetic number, because the mean of its divisors is an integer number (4861899870).

Almost surely, 2^18475219487 is an apocalyptic number.

18475219487 is a deficient number, since it is larger than the sum of its proper divisors (972379993).

18475219487 is an equidigital number, since it uses as much as digits as its factorization.

18475219487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972379992.

The product of its digits is 4515840, while the sum is 56.

The spelling of 18475219487 in words is "eighteen billion, four hundred seventy-five million, two hundred nineteen thousand, four hundred eighty-seven".