20085802618 has 64 divisors (see below), whose sum is σ = 36250841088. Its totient is φ = 8160768000.

The previous prime is 20085802537. The next prime is 20085802619. The reversal of 20085802618 is 81620858002.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20085802619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20770771 + ... + 20771737.

It is an arithmetic number, because the mean of its divisors is an integer number (566419392).

Almost surely, 2^20085802618 is an apocalyptic number.

20085802618 is a deficient number, since it is larger than the sum of its proper divisors (16165038470).

20085802618 is a wasteful number, since it uses less digits than its factorization.

20085802618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507.

The product of its (nonzero) digits is 61440, while the sum is 40.

The spelling of 20085802618 in words is "twenty billion, eighty-five million, eight hundred two thousand, six hundred eighteen".