18384020002 has 4 divisors (see below), whose sum is σ = 27576030006. Its totient is φ = 9192010000.

The previous prime is 18384019957. The next prime is 18384020003. The reversal of 18384020002 is 20002048381.

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., 10235166561 + 8148853441 = 101169^2 + 90271^2 .

It is not an unprimeable number, because it can be changed into a prime (18384020003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4596004999 + ... + 4596005002.

Almost surely, 2^18384020002 is an apocalyptic number.

18384020002 is a deficient number, since it is larger than the sum of its proper divisors (9192010004).

18384020002 is an equidigital number, since it uses as much as digits as its factorization.

18384020002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9192010003.

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 18384020002 its reverse (20002048381), we get a palindrome (38386068383).

The spelling of 18384020002 in words is "eighteen billion, three hundred eighty-four million, twenty thousand, two".