2021161650 has 24 divisors (see below), whose sum is σ = 5012481264. Its totient is φ = 538976400.

The previous prime is 2021161619. The next prime is 2021161661. The reversal of 2021161650 is 561611202.

It is a self number, because there is not a number n which added to its sum of digits gives 2021161650.

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 11 ways as a sum of consecutive naturals, for example, 6737056 + ... + 6737355.

It is an arithmetic number, because the mean of its divisors is an integer number (208853386).

Almost surely, 2^2021161650 is an apocalyptic number.

2021161650 is an abundant number, since it is smaller than the sum of its proper divisors (2991319614).

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

2021161650 is a wasteful number, since it uses less digits than its factorization.

2021161650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13474426 (or 13474421 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 2021161650 is about 44957.3314377088. The cubic root of 2021161650 is about 1264.3491368666.

Adding to 2021161650 its reverse (561611202), we get a palindrome (2582772852).

The spelling of 2021161650 in words is "two billion, twenty-one million, one hundred sixty-one thousand, six hundred fifty".