20928018858 has 8 divisors (see below), whose sum is σ = 41856037728. Its totient is φ = 6976006284.

The previous prime is 20928018829. The next prime is 20928018871. The reversal of 20928018858 is 85881082902.

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

20928018858 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 20928018858.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1744001566 + ... + 1744001577.

It is an arithmetic number, because the mean of its divisors is an integer number (5232004716).

Almost surely, 2^20928018858 is an apocalyptic number.

20928018858 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.

20928018858 is a wasteful number, since it uses less digits than its factorization.

20928018858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3488003148.

The product of its (nonzero) digits is 737280, while the sum is 51.

The spelling of 20928018858 in words is "twenty billion, nine hundred twenty-eight million, eighteen thousand, eight hundred fifty-eight".