18184398002 has 4 divisors (see below), whose sum is σ = 27276597006. Its totient is φ = 9092199000.

The previous prime is 18184397993. The next prime is 18184398017. The reversal of 18184398002 is 20089348181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20089348181 = 7 ⋅2869906883.

It can be written as a sum of positive squares in only one way, i.e., 16141448401 + 2042949601 = 127049^2 + 45199^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4546099499 + ... + 4546099502.

Almost surely, 2^18184398002 is an apocalyptic number.

18184398002 is a deficient number, since it is larger than the sum of its proper divisors (9092199004).

18184398002 is an equidigital number, since it uses as much as digits as its factorization.

18184398002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9092199003.

The product of its (nonzero) digits is 110592, while the sum is 44.

The spelling of 18184398002 in words is "eighteen billion, one hundred eighty-four million, three hundred ninety-eight thousand, two".