2101655020 has 12 divisors (see below), whose sum is σ = 4413475584. Its totient is φ = 840662000.

The previous prime is 2101655011. The next prime is 2101655029. The reversal of 2101655020 is 205561012.

It is an interprime number because it is at equal distance from previous prime (2101655011) and next prime (2101655029).

It is a junction number, because it is equal to n+sod(n) for n = 2101654982 and 2101655000.

It is not an unprimeable number, because it can be changed into a prime (2101655029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52541356 + ... + 52541395.

It is an arithmetic number, because the mean of its divisors is an integer number (367789632).

Almost surely, 2^2101655020 is an apocalyptic number.

2101655020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101655020 is an abundant number, since it is smaller than the sum of its proper divisors (2311820564).

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

2101655020 is a wasteful number, since it uses less digits than its factorization.

2101655020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105082760 (or 105082758 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 2101655020 is about 45843.8111417452. The cubic root of 2101655020 is about 1280.9154868300.

The spelling of 2101655020 in words is "two billion, one hundred one million, six hundred fifty-five thousand, twenty".