20599078818 has 8 divisors (see below), whose sum is σ = 41198157648. Its totient is φ = 6866359604.

The previous prime is 20599078751. The next prime is 20599078847. The reversal of 20599078818 is 81887099502.

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

20599078818 is an admirable number.

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, 1716589896 + ... + 1716589907.

It is an arithmetic number, because the mean of its divisors is an integer number (5149769706).

Almost surely, 2^20599078818 is an apocalyptic number.

20599078818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20599078818 is a wasteful number, since it uses less digits than its factorization.

20599078818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3433179808.

The product of its (nonzero) digits is 2903040, while the sum is 57.

The spelling of 20599078818 in words is "twenty billion, five hundred ninety-nine million, seventy-eight thousand, eight hundred eighteen".