18448274851 has 4 divisors (see below), whose sum is σ = 18946876912. Its totient is φ = 17949672792.

The previous prime is 18448274837. The next prime is 18448274857. The reversal of 18448274851 is 15847284481.

It is a happy number.

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 18448274851 - 2¹¹ = 18448272803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18448274857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249300975 + ... + 249301048.

It is an arithmetic number, because the mean of its divisors is an integer number (4736719228).

Almost surely, 2^18448274851 is an apocalyptic number.

18448274851 is a deficient number, since it is larger than the sum of its proper divisors (498602061).

18448274851 is an equidigital number, since it uses as much as digits as its factorization.

18448274851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498602060.

The product of its digits is 2293760, while the sum is 52.

The spelling of 18448274851 in words is "eighteen billion, four hundred forty-eight million, two hundred seventy-four thousand, eight hundred fifty-one".