18842894569 has 8 divisors (see below), whose sum is σ = 18894556800. Its totient is φ = 18791289696.

The previous prime is 18842894563. The next prime is 18842894591. The reversal of 18842894569 is 96549824881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18842894569 - 2²⁷ = 18708676841 is a prime.

It is a super-2 number, since 2×18842894569² (a number of 21 digits) contains 22 as substring.

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 18842894569.

It is not an unprimeable number, because it can be changed into a prime (18842894563) 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 7 ways as a sum of consecutive naturals, for example, 690309 + ... + 717085.

It is an arithmetic number, because the mean of its divisors is an integer number (2361819600).

Almost surely, 2^18842894569 is an apocalyptic number.

It is an amenable number.

18842894569 is a deficient number, since it is larger than the sum of its proper divisors (51662231).

18842894569 is a wasteful number, since it uses less digits than its factorization.

18842894569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28679.

The product of its digits is 39813120, while the sum is 64.

The spelling of 18842894569 in words is "eighteen billion, eight hundred forty-two million, eight hundred ninety-four thousand, five hundred sixty-nine".