820009018 has 8 divisors (see below), whose sum is σ = 1283492448. Its totient is φ = 392178204.

The previous prime is 820008977. The next prime is 820009037. The reversal of 820009018 is 810900028.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8913096 + ... + 8913187.

It is an arithmetic number, because the mean of its divisors is an integer number (160436556).

Almost surely, 2^820009018 is an apocalyptic number.

820009018 is a deficient number, since it is larger than the sum of its proper divisors (463483430).

820009018 is a wasteful number, since it uses less digits than its factorization.

820009018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17826308.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 820009018 is about 28635.7995872300. The cubic root of 820009018 is about 935.9935935045.

The spelling of 820009018 in words is "eight hundred twenty million, nine thousand, eighteen".