18855465773 has 4 divisors (see below), whose sum is σ = 18878377248. Its totient is φ = 18832554300.

The previous prime is 18855465763. The next prime is 18855465779. The reversal of 18855465773 is 37756455881.

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 18855465773 - 2¹⁸ = 18855203629 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 (18855465779) 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, 11454503 + ... + 11456148.

It is an arithmetic number, because the mean of its divisors is an integer number (4719594312).

Almost surely, 2^18855465773 is an apocalyptic number.

It is an amenable number.

18855465773 is a deficient number, since it is larger than the sum of its proper divisors (22911475).

18855465773 is an equidigital number, since it uses as much as digits as its factorization.

18855465773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22911474.

The product of its digits is 28224000, while the sum is 59.

The spelling of 18855465773 in words is "eighteen billion, eight hundred fifty-five million, four hundred sixty-five thousand, seven hundred seventy-three".