2126171320 has 256 divisors, whose sum is σ = 6113802240. Its totient is φ = 647682048.

The previous prime is 2126171297. The next prime is 2126171357. The reversal of 2126171320 is 231716212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19870707 + ... + 19870813.

It is an arithmetic number, because the mean of its divisors is an integer number (23882040).

Almost surely, 2^2126171320 is an apocalyptic number.

2126171320 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 2126171320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3056901120).

2126171320 is an abundant number, since it is smaller than the sum of its proper divisors (3987630920).

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

2126171320 is a wasteful number, since it uses less digits than its factorization.

2126171320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 2126171320 is about 46110.4252853951. The cubic root of 2126171320 is about 1285.8769710425.

Adding to 2126171320 its reverse (231716212), we get a palindrome (2357887532).

The spelling of 2126171320 in words is "two billion, one hundred twenty-six million, one hundred seventy-one thousand, three hundred twenty".