2101855460 has 48 divisors (see below), whose sum is σ = 4611430656. Its totient is φ = 803206272.

The previous prime is 2101855451. The next prime is 2101855477. The reversal of 2101855460 is 645581012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 456329 + ... + 460911.

It is an arithmetic number, because the mean of its divisors is an integer number (96071472).

Almost surely, 2^2101855460 is an apocalyptic number.

2101855460 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 2101855460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2305715328).

2101855460 is an abundant number, since it is smaller than the sum of its proper divisors (2509575196).

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

2101855460 is a wasteful number, since it uses less digits than its factorization.

2101855460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5612 (or 5610 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 2101855460 is about 45845.9972080442. The cubic root of 2101855460 is about 1280.9562068873.

The spelling of 2101855460 in words is "two billion, one hundred one million, eight hundred fifty-five thousand, four hundred sixty".