18489446594 has 4 divisors (see below), whose sum is σ = 27734169894. Its totient is φ = 9244723296.

The previous prime is 18489446587. The next prime is 18489446603. The reversal of 18489446594 is 49564498481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49564498481 = 457 ⋅108456233.

It can be written as a sum of positive squares in only one way, i.e., 18438109369 + 51337225 = 135787^2 + 7165^2 .

It is a super-3 number, since 3×18489446594³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4622361647 + ... + 4622361650.

Almost surely, 2^18489446594 is an apocalyptic number.

18489446594 is a deficient number, since it is larger than the sum of its proper divisors (9244723300).

18489446594 is an equidigital number, since it uses as much as digits as its factorization.

18489446594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9244723299.

The product of its digits is 39813120, while the sum is 62.

The spelling of 18489446594 in words is "eighteen billion, four hundred eighty-nine million, four hundred forty-six thousand, five hundred ninety-four".