2166250020 has 96 divisors (see below), whose sum is σ = 6682628736. Its totient is φ = 519936000.

The previous prime is 2166249979. The next prime is 2166250043. The reversal of 2166250020 is 200526612.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50412 + ... + 82908.

It is an arithmetic number, because the mean of its divisors is an integer number (69610716).

Almost surely, 2^2166250020 is an apocalyptic number.

2166250020 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 2166250020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3341314368).

2166250020 is an abundant number, since it is smaller than the sum of its proper divisors (4516378716).

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

2166250020 is a wasteful number, since it uses less digits than its factorization.

2166250020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32621 (or 32619 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 2166250020 is about 46542.9910942561. The cubic root of 2166250020 is about 1293.9063967386.

Adding to 2166250020 its reverse (200526612), we get a palindrome (2366776632).

The spelling of 2166250020 in words is "two billion, one hundred sixty-six million, two hundred fifty thousand, twenty".