18458725789 has 4 divisors (see below), whose sum is σ = 21095686624. Its totient is φ = 15821764956.

The previous prime is 18458725759. The next prime is 18458725793. The reversal of 18458725789 is 98752785481.

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 18458725789 - 2²³ = 18450337181 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 18458725789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18458725729) 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, 1318480407 + ... + 1318480420.

It is an arithmetic number, because the mean of its divisors is an integer number (5273921656).

Almost surely, 2^18458725789 is an apocalyptic number.

It is an amenable number.

18458725789 is a deficient number, since it is larger than the sum of its proper divisors (2636960835).

18458725789 is an equidigital number, since it uses as much as digits as its factorization.

18458725789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2636960834.

The product of its digits is 45158400, while the sum is 64.

The spelling of 18458725789 in words is "eighteen billion, four hundred fifty-eight million, seven hundred twenty-five thousand, seven hundred eighty-nine".