21165183082 has 8 divisors (see below), whose sum is σ = 31865796900. Its totient is φ = 10543250784.

The previous prime is 21165183077. The next prime is 21165183089. The reversal of 21165183082 is 28038156112.

It can be written as a sum of positive squares in 2 ways, for example, as 19385271361 + 1779911721 = 139231^2 + 42189^2 .

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 (21165183089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19669707 + ... + 19670782.

Almost surely, 2^21165183082 is an apocalyptic number.

21165183082 is a deficient number, since it is larger than the sum of its proper divisors (10700613818).

21165183082 is a wasteful number, since it uses less digits than its factorization.

21165183082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39340760.

The product of its (nonzero) digits is 23040, while the sum is 37.

The spelling of 21165183082 in words is "twenty-one billion, one hundred sixty-five million, one hundred eighty-three thousand, eighty-two".