18420242002 has 8 divisors (see below), whose sum is σ = 27751020300. Its totient is φ = 9169901904.

The previous prime is 18420241997. The next prime is 18420242039. The reversal of 18420242002 is 20024202481.

It can be written as a sum of positive squares in 2 ways, for example, as 14898887721 + 3521354281 = 122061^2 + 59341^2 .

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

It is an unprimeable number.

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, 20108977 + ... + 20109892.

Almost surely, 2^18420242002 is an apocalyptic number.

18420242002 is a deficient number, since it is larger than the sum of its proper divisors (9330778298).

18420242002 is a wasteful number, since it uses less digits than its factorization.

18420242002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40219100.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 18420242002 its reverse (20024202481), we get a palindrome (38444444483).

The spelling of 18420242002 in words is "eighteen billion, four hundred twenty million, two hundred forty-two thousand, two".