8126321420 has 96 divisors (see below), whose sum is σ = 20239994880. Its totient is φ = 2681521920.

The previous prime is 8126321387. The next prime is 8126321459. The reversal of 8126321420 is 241236218.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (29).

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 31 ways as a sum of consecutive naturals, for example, 1340837 + ... + 1346883.

It is an arithmetic number, because the mean of its divisors is an integer number (210833280).

Almost surely, 2^8126321420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8126321420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10119997440).

8126321420 is an abundant number, since it is smaller than the sum of its proper divisors (12113673460).

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

8126321420 is a wasteful number, since it uses less digits than its factorization.

8126321420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6423 (or 6421 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 8126321420 is about 90146.1115079292. Note that the first 3 decimals coincide. The cubic root of 8126321420 is about 2010.4718593853.

Adding to 8126321420 its reverse (241236218), we get a palindrome (8367557638).

The spelling of 8126321420 in words is "eight billion, one hundred twenty-six million, three hundred twenty-one thousand, four hundred twenty".