1000000018 has 4 divisors (see below), whose sum is σ = 1500000030. Its totient is φ = 500000008.

The previous prime is 1000000009. The next prime is 1000000021. The reversal of 1000000018 is 8100000001.

1000000018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8100000001 = 8017 ⋅1010353.

It can be written as a sum of positive squares in only one way, i.e., 922154689 + 77845329 = 30367^2 + 8823^2 .

1000000018 is a modest number, since divided by 18 gives 10 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 999999950 and 1000000013.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250000003 + ... + 250000006.

Almost surely, 2^1000000018 is an apocalyptic number.

1000000018 is a deficient number, since it is larger than the sum of its proper divisors (500000012).

1000000018 is an equidigital number, since it uses as much as digits as its factorization.

1000000018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500000011.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1000000018 is about 31622.7768862888. The cubic root of 1000000018 is about 1000.0000060000. Note that the first 5 decimals are identical.

Adding to 1000000018 its reverse (8100000001), we get a palindrome (9100000019).

It can be divided in two parts, 100000001 and 8, that multiplied together give a palindrome (800000008).

The spelling of 1000000018 in words is "one billion, eighteen", and thus it is an aban number and an uban number.