18758887573 has 4 divisors (see below), whose sum is σ = 19076834880. Its totient is φ = 18440940268.

The previous prime is 18758887547. The next prime is 18758887577. The reversal of 18758887573 is 37578885781.

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.

It is a cyclic number.

It is not a de Polignac number, because 18758887573 - 2⁹ = 18758887061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18758887499 and 18758887508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18758887577) 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, 158973565 + ... + 158973682.

It is an arithmetic number, because the mean of its divisors is an integer number (4769208720).

Almost surely, 2^18758887573 is an apocalyptic number.

It is an amenable number.

18758887573 is a deficient number, since it is larger than the sum of its proper divisors (317947307).

18758887573 is an equidigital number, since it uses as much as digits as its factorization.

18758887573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317947306.

The product of its digits is 105369600, while the sum is 67.

The spelling of 18758887573 in words is "eighteen billion, seven hundred fifty-eight million, eight hundred eighty-seven thousand, five hundred seventy-three".