202018 has 4 divisors (see below), whose sum is σ = 303030. Its totient is φ = 101008.

The previous prime is 202001. The next prime is 202021. The reversal of 202018 is 810202.

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., 199809 + 2209 = 447^2 + 47^2 .

It is a super-2 number, since 2×202018² = 81622544648, which contains 22 as substring.

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 = 201989 and 202007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50503 + ... + 50506.

2²⁰²⁰¹⁸ is an apocalyptic number.

202018 is a deficient number, since it is larger than the sum of its proper divisors (101012).

202018 is a wasteful number, since it uses less digits than its factorization.

202018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101011.

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

The square root of 202018 is about 449.4641253760. The cubic root of 202018 is about 58.6763858438.

The spelling of 202018 in words is "two hundred two thousand, eighteen".