18854179469 has 4 divisors (see below), whose sum is σ = 18889030620. Its totient is φ = 18819328320.

The previous prime is 18854179453. The next prime is 18854179483. The reversal of 18854179469 is 96497145881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3664849444 + 15189330025 = 60538^2 + 123245^2 .

It is a cyclic number.

It is not a de Polignac number, because 18854179469 - 2⁴ = 18854179453 is a prime.

It is a super-2 number, since 2×18854179469² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18854179439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17424764 + ... + 17425845.

It is an arithmetic number, because the mean of its divisors is an integer number (4722257655).

Almost surely, 2^18854179469 is an apocalyptic number.

It is an amenable number.

18854179469 is a deficient number, since it is larger than the sum of its proper divisors (34851151).

18854179469 is an equidigital number, since it uses as much as digits as its factorization.

18854179469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34851150.

The product of its digits is 17418240, while the sum is 62.

The spelling of 18854179469 in words is "eighteen billion, eight hundred fifty-four million, one hundred seventy-nine thousand, four hundred sixty-nine".