18489479066 has 8 divisors (see below), whose sum is σ = 27735028020. Its totient is φ = 9244469728.

The previous prime is 18489479053. The next prime is 18489479069. The reversal of 18489479066 is 66097498481.

It can be written as a sum of positive squares in 2 ways, for example, as 18339930625 + 149548441 = 135425^2 + 12229^2 .

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

It is a super-2 number, since 2×18489479066² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18489479069) 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, 34211 + ... + 195318.

Almost surely, 2^18489479066 is an apocalyptic number.

18489479066 is a deficient number, since it is larger than the sum of its proper divisors (9245548954).

18489479066 is a wasteful number, since it uses less digits than its factorization.

18489479066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269808.

The product of its (nonzero) digits is 20901888, while the sum is 62.

The spelling of 18489479066 in words is "eighteen billion, four hundred eighty-nine million, four hundred seventy-nine thousand, sixty-six".