2179810020 has 24 divisors (see below), whose sum is σ = 6103468224. Its totient is φ = 581282656.

The previous prime is 2179809997. The next prime is 2179810033. The reversal of 2179810020 is 200189712.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 2179810020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18165024 + ... + 18165143.

It is an arithmetic number, because the mean of its divisors is an integer number (254311176).

Almost surely, 2^2179810020 is an apocalyptic number.

2179810020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2179810020 is an abundant number, since it is smaller than the sum of its proper divisors (3923658204).

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

2179810020 is a wasteful number, since it uses less digits than its factorization.

2179810020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36330179 (or 36330177 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 2179810020 is about 46688.4356131152. The cubic root of 2179810020 is about 1296.6005899264.

Adding to 2179810020 its reverse (200189712), we get a palindrome (2379999732).

The spelling of 2179810020 in words is "two billion, one hundred seventy-nine million, eight hundred ten thousand, twenty".