18352812073 has 4 divisors (see below), whose sum is σ = 19150760448. Its totient is φ = 17554863700.

The previous prime is 18352812067. The next prime is 18352812097. The reversal of 18352812073 is 37021825381.

It is a happy number.

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 18352812073 - 2²⁵ = 18319257641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18352812473) 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, 398974153 + ... + 398974198.

It is an arithmetic number, because the mean of its divisors is an integer number (4787690112).

Almost surely, 2^18352812073 is an apocalyptic number.

It is an amenable number.

18352812073 is a deficient number, since it is larger than the sum of its proper divisors (797948375).

18352812073 is an equidigital number, since it uses as much as digits as its factorization.

18352812073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797948374.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 18352812073 in words is "eighteen billion, three hundred fifty-two million, eight hundred twelve thousand, seventy-three".