18202002002 has 4 divisors (see below), whose sum is σ = 27303003006. Its totient is φ = 9101001000.

The previous prime is 18202002001. The next prime is 18202002011. The reversal of 18202002002 is 20020020281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17678095681 + 523906321 = 132959^2 + 22889^2 .

It is not an unprimeable number, because it can be changed into a prime (18202002001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4550500499 + ... + 4550500502.

Almost surely, 2^18202002002 is an apocalyptic number.

18202002002 is a deficient number, since it is larger than the sum of its proper divisors (9101001004).

18202002002 is an equidigital number, since it uses as much as digits as its factorization.

18202002002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9101001003.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 18202002002 its reverse (20020020281), we get a palindrome (38222022283).

The spelling of 18202002002 in words is "eighteen billion, two hundred two million, two thousand, two".