51868870220 has 48 divisors (see below), whose sum is σ = 109227675648. Its totient is φ = 20689905600.

The previous prime is 51868870219. The next prime is 51868870223. The reversal of 51868870220 is 2207886815.

It is not an unprimeable number, because it can be changed into a prime (51868870223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18191795 + ... + 18194645.

It is an arithmetic number, because the mean of its divisors is an integer number (2275576576).

Almost surely, 2^51868870220 is an apocalyptic number.

It is an amenable number.

51868870220 is an abundant number, since it is smaller than the sum of its proper divisors (57358805428).

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

51868870220 is a wasteful number, since it uses less digits than its factorization.

51868870220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5070 (or 5068 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 47.

The spelling of 51868870220 in words is "fifty-one billion, eight hundred sixty-eight million, eight hundred seventy thousand, two hundred twenty".