2102855992420 has 96 divisors (see below), whose sum is σ = 4783565445120. Its totient is φ = 773962600320.

The previous prime is 2102855992411. The next prime is 2102855992421. The reversal of 2102855992420 is 242995582012.

It is not an unprimeable number, because it can be changed into a prime (2102855992421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1890267 + ... + 2789053.

It is an arithmetic number, because the mean of its divisors is an integer number (49828806720).

Almost surely, 2^{2102855992420} is an apocalyptic number.

2102855992420 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 2102855992420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2391782722560).

2102855992420 is an abundant number, since it is smaller than the sum of its proper divisors (2680709452700).

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

2102855992420 is a wasteful number, since it uses less digits than its factorization.

2102855992420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898993 (or 898991 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 2102855992420 in words is "two trillion, one hundred two billion, eight hundred fifty-five million, nine hundred ninety-two thousand, four hundred twenty".