6819809220 has 216 divisors, whose sum is σ = 24301053504. Its totient is φ = 1543473792.

The previous prime is 6819809219. The next prime is 6819809239. The reversal of 6819809220 is 229089186.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 71 ways as a sum of consecutive naturals, for example, 904707 + ... + 912213.

Almost surely, 2^6819809220 is an apocalyptic number.

6819809220 is a gapful number since it is divisible by the number (60) 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 6819809220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12150526752).

6819809220 is an abundant number, since it is smaller than the sum of its proper divisors (17481244284).

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

6819809220 is a wasteful number, since it uses less digits than its factorization.

6819809220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7639 (or 7627 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 6819809220 is about 82582.1362039031. The cubic root of 6819809220 is about 1896.3743619323.

The spelling of 6819809220 in words is "six billion, eight hundred nineteen million, eight hundred nine thousand, two hundred twenty".