18140002 has 4 divisors (see below), whose sum is σ = 27210006. Its totient is φ = 9070000.

The previous prime is 18139987. The next prime is 18140009. The reversal of 18140002 is 20004181.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20004181 = 23 ⋅869747.

It can be written as a sum of positive squares in only one way, i.e., 16232841 + 1907161 = 4029^2 + 1381^2 .

It is not an unprimeable number, because it can be changed into a prime (18140009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4534999 + ... + 4535002.

Almost surely, 2^18140002 is an apocalyptic number.

18140002 is a deficient number, since it is larger than the sum of its proper divisors (9070004).

18140002 is an equidigital number, since it uses as much as digits as its factorization.

18140002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9070003.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 18140002 is about 4259.1081226003. The cubic root of 18140002 is about 262.7518465814.

Adding to 18140002 its reverse (20004181), we get a palindrome (38144183).

The spelling of 18140002 in words is "eighteen million, one hundred forty thousand, two".