6820018 has 4 divisors (see below), whose sum is σ = 10230030. Its totient is φ = 3410008.

The previous prime is 6820013. The next prime is 6820019. The reversal of 6820018 is 8100286.

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., 6692569 + 127449 = 2587^2 + 357^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6819974 and 6820001.

It is not an unprimeable number, because it can be changed into a prime (6820013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1705003 + ... + 1705006.

Almost surely, 2^6820018 is an apocalyptic number.

6820018 is a deficient number, since it is larger than the sum of its proper divisors (3410012).

6820018 is a wasteful number, since it uses less digits than its factorization.

6820018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3410011.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 6820018 is about 2611.5164177160. The cubic root of 6820018 is about 189.6393713451.

The spelling of 6820018 in words is "six million, eight hundred twenty thousand, eighteen".