20020018 has 8 divisors (see below), whose sum is σ = 30327660. Its totient is φ = 9910800.

The previous prime is 20020001. The next prime is 20020019. The reversal of 20020018 is 81002002.

It can be written as a sum of positive squares in 2 ways, for example, as 16459249 + 3560769 = 4057^2 + 1887^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20020018² = 801602241440648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20020019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49353 + ... + 49756.

Almost surely, 2^20020018 is an apocalyptic number.

20020018 is a deficient number, since it is larger than the sum of its proper divisors (10307642).

20020018 is a wasteful number, since it uses less digits than its factorization.

20020018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99212.

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

The square root of 20020018 is about 4474.3734756947. The cubic root of 20020018 is about 271.5322934815.

The spelling of 20020018 in words is "twenty million, twenty thousand, eighteen".