21839482666 has 8 divisors (see below), whose sum is σ = 33296260644. Its totient is φ = 10740729120.

The previous prime is 21839482663. The next prime is 21839482673. The reversal of 21839482666 is 66628493812.

It can be written as a sum of positive squares in 2 ways, for example, as 21790188225 + 49294441 = 147615^2 + 7021^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21839482663) 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, 89505955 + ... + 89506198.

Almost surely, 2^21839482666 is an apocalyptic number.

21839482666 is a deficient number, since it is larger than the sum of its proper divisors (11456777978).

21839482666 is a wasteful number, since it uses less digits than its factorization.

21839482666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179012216.

The product of its digits is 5971968, while the sum is 55.

It can be divided in two parts, 2183 and 9482666, that added together give a palindrome (9484849).

The spelling of 21839482666 in words is "twenty-one billion, eight hundred thirty-nine million, four hundred eighty-two thousand, six hundred sixty-six".