2120478855800 has 96 divisors (see below), whose sum is σ = 5082067941120. Its totient is φ = 822386160000.

The previous prime is 2120478855779. The next prime is 2120478855811. The reversal of 2120478855800 is 85588740212.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48326 + ... + 2059925.

It is an arithmetic number, because the mean of its divisors is an integer number (52938207720).

Almost surely, 2^{2120478855800} is an apocalyptic number.

2120478855800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2120478855800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2541033970560).

2120478855800 is an abundant number, since it is smaller than the sum of its proper divisors (2961589085320).

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

2120478855800 is a wasteful number, since it uses less digits than its factorization.

2120478855800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108421 (or 2108412 counting only the distinct ones).

The product of its (nonzero) digits is 1433600, while the sum is 50.

The spelling of 2120478855800 in words is "two trillion, one hundred twenty billion, four hundred seventy-eight million, eight hundred fifty-five thousand, eight hundred".