2162784020 has 18 divisors (see below), whose sum is σ = 4542283242. Its totient is φ = 865030416.

The previous prime is 2162784017. The next prime is 2162784031. The reversal of 2162784020 is 204872612.

It can be written as a sum of positive squares in only one way, i.e., 1730227216 + 432556804 = 41596^2 + 20798^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 202781 + ... + 213179.

It is an arithmetic number, because the mean of its divisors is an integer number (252349069).

Almost surely, 2^2162784020 is an apocalyptic number.

2162784020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2162784020 is an abundant number, since it is smaller than the sum of its proper divisors (2379499222).

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

2162784020 is an frugal number, since it uses more digits than its factorization.

2162784020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20807 (or 10406 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 2162784020 is about 46505.7417960406. The cubic root of 2162784020 is about 1293.2159449614.

The spelling of 2162784020 in words is "two billion, one hundred sixty-two million, seven hundred eighty-four thousand, twenty".