805268018 has 4 divisors (see below), whose sum is σ = 1207902030. Its totient is φ = 402634008.

The previous prime is 805268017. The next prime is 805268029. The reversal of 805268018 is 810862508.

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., 476679889 + 328588129 = 21833^2 + 18127^2 .

It is not an unprimeable number, because it can be changed into a prime (805268017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201317003 + ... + 201317006.

Almost surely, 2^805268018 is an apocalyptic number.

805268018 is a deficient number, since it is larger than the sum of its proper divisors (402634012).

805268018 is a wasteful number, since it uses less digits than its factorization.

805268018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402634011.

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 805268018 is about 28377.2447217837. The cubic root of 805268018 is about 930.3509747853.

The spelling of 805268018 in words is "eight hundred five million, two hundred sixty-eight thousand, eighteen".