8021018 has 4 divisors (see below), whose sum is σ = 12031530. Its totient is φ = 4010508.

The previous prime is 8021017. The next prime is 8021029. The reversal of 8021018 is 8101208.

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., 4609609 + 3411409 = 2147^2 + 1847^2 .

It is not an unprimeable number, because it can be changed into a prime (8021011) by changing a digit.

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, 2005253 + ... + 2005256.

Almost surely, 2^8021018 is an apocalyptic number.

8021018 is a deficient number, since it is larger than the sum of its proper divisors (4010512).

8021018 is a wasteful number, since it uses less digits than its factorization.

8021018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4010511.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 8021018 is about 2832.1401801465. The cubic root of 8021018 is about 200.1749968359.

The spelling of 8021018 in words is "eight million, twenty-one thousand, eighteen".