820068618 has 32 divisors (see below), whose sum is σ = 1654732800. Its totient is φ = 270932400.

The previous prime is 820068607. The next prime is 820068647. The reversal of 820068618 is 816860028.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 585483 + ... + 586881.

It is an arithmetic number, because the mean of its divisors is an integer number (51710400).

Almost surely, 2^820068618 is an apocalyptic number.

820068618 is an abundant number, since it is smaller than the sum of its proper divisors (834664182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

820068618 is a wasteful number, since it uses less digits than its factorization.

820068618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202.

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 820068618 is about 28636.8402237398. The cubic root of 820068618 is about 936.0162696237.

The spelling of 820068618 in words is "eight hundred twenty million, sixty-eight thousand, six hundred eighteen".