20002018 has 4 divisors (see below), whose sum is σ = 30003030. Its totient is φ = 10001008.

The previous prime is 20002007. The next prime is 20002027. The reversal of 20002018 is 81020002.

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., 13965169 + 6036849 = 3737^2 + 2457^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 20001989 and 20002007.

It is an unprimeable number.

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, 5000503 + ... + 5000506.

Almost surely, 2^20002018 is an apocalyptic number.

20002018 is a deficient number, since it is larger than the sum of its proper divisors (10001012).

20002018 is a wasteful number, since it uses less digits than its factorization.

20002018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10001011.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 20002018 is about 4472.3615685676. The cubic root of 20002018 is about 271.4508908437.

The spelling of 20002018 in words is "twenty million, two thousand, eighteen".